{"id":5507,"date":"2025-12-24T17:18:16","date_gmt":"2025-12-24T08:18:16","guid":{"rendered":"https:\/\/math-travel.com\/?p=5507"},"modified":"2026-03-04T08:59:20","modified_gmt":"2026-03-03T23:59:20","slug":"heikouidou","status":"publish","type":"post","link":"https:\/\/math-travel.jp\/math-1\/heikouidou\/","title":{"rendered":"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u516c\u5f0f\u3092\u8a3c\u660e\uff01\u306a\u305c\u300c\u30de\u30a4\u30ca\u30b9\u300d\u306b\u306a\u308b\u306e\u304b\u7406\u7531\u3092\u89e3\u8aac"},"content":{"rendered":"\n<p>\u4eca\u56de\u306f2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u306b\u95a2\u3059\u308b\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u4eca\u56de\u89e3\u6c7a\u3059\u308b\u60a9\u307f<\/span><\/div><div class=\"cap_box_content\">\n<p>\u300c\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f\u3063\u3066\u306a\u3093\u3060\u3063\u3051\u300d <\/p>\n\n\n\n<p>\u300c2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u3063\u3066\uff1f\u300d<\/p>\n<\/div><\/div>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>\u30b0\u30e9\u30d5\u306e\u5f62\u3092\u4e00\u5207\u5909\u3048\u308b\u3053\u3068\u306a\u304f\u79fb\u52d5\u3055\u305b\u308b\u3053\u3068\u3092<span class=\"hutoaka\">\u5e73\u884c\u79fb\u52d5<\/span>\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"464\" height=\"223\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5.png\" alt=\"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\" class=\"wp-image-5520\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5.png 464w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5-300x144.png 300w\" sizes=\"(max-width: 464px) 100vw, 464px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(y=ax^{2}\\)\u306e\u30b0\u30e9\u30d5\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u306f<\/p>\n\n\n\n<p>\\[y=a(x-p)^{2}+q\\]<\/p>\n\n\n\n<p>\u3068\u8868\u3057\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f<span class=\"hutoaka\">2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u305c\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f\u3067\u306f\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\u304b\u3082\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u6700\u5f8c\u307e\u3067\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"koushiki\">2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1200\" height=\"655\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_0.webp\" alt=\"2\u6b21\u95a2\u6570\u306e\u57fa\u672c\u5f62\u304b\u3089\u5e73\u884c\u79fb\u52d5\u5f8c\u306e\u5f0f\u3078\u306e\u5909\u5316\u3068\u3001\u9802\u70b9\u306e\u79fb\u52d5\u3092\u8996\u899a\u5316\u3057\u305f\u6982\u5ff5\u56f3\" class=\"wp-image-21589\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_0.webp 1200w, https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_0-768x419.webp 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n\n<p>2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u306b\u306f\u516c\u5f0f\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"464\" height=\"223\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5.png\" alt=\"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\" class=\"wp-image-5520\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5.png 464w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5-300x144.png 300w\" sizes=\"(max-width: 464px) 100vw, 464px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(y=ax^{2}\\)\u306e\u30b0\u30e9\u30d5\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u306f<\/p>\n\n\n\n<p>\\(y=a(x-p)^{2}+q\\)<\/p>\n<\/div><\/div>\n\n\n\n<p>\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3059\u308b\u3068\u304d\u306f\u3001\\(x\\)\u3092\\(x-p\\)\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3059\u308b\u306a\u3089\u3001\\(y\\)\u3092\\(y-p\\)\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3067\\(y=ax^{2}\\)\u306e\u30b0\u30e9\u30d5\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u306f<\/p>\n\n\n\n<p>\\(y=a(x-p)^{2}+q\\)\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>2\u6b21\u95a2\u6570\u306e\u8ef8\u3084\u9802\u70b9\u3092\u6c42\u3081\u65b9\u3092\u77e5\u3063\u3066\u3044\u308b\u3068\u3001\u4eca\u56de\u306e\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f\u3082\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\uff1e\uff1e2\u6b21\u95a2\u6570\u306e\u9802\u70b9\u30fb\u8ef8\u3092\u5e73\u65b9\u5b8c\u6210\u3067\u6c42\u3081\u308b\u624b\u9806\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\uff01<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi5-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u3053\u308c\u306f\u6697\u8a18\u3059\u308b\u516c\u5f0f\u3067\u3059\u304b\uff1f<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi1-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30b7\u30fc\u30bf<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u5e73\u884c\u79fb\u52d5\u306f\u6697\u8a18\u3067\u306f\u306a\u304f\u3001\u4f7f\u3044\u65b9\u3092\u899a\u3048\u3066\u6b32\u3057\u3044\u304b\u306a\uff01<br>\u5177\u4f53\u4f8b\u3092\u898b\u305b\u308b\u304b\u3089\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u3088\u3046\u3002<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u4f8b1\u3000\\(y=x^{2}\\)\u3092\u5e73\u884c\u79fb\u52d5<\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"443\" height=\"299\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d51-1.png\" alt=\"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d51\" class=\"wp-image-5536\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d51-1.png 443w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d51-1-300x202.png 300w\" sizes=\"(max-width: 443px) 100vw, 443px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u4f8b\u984c\uff11<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(y=x^{2}\\)\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(3\\),\\(y\\)\u8ef8\u65b9\u5411\u306b\\(2\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u3002<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u306e\u5834\u5408\u3001\\(x\\)\u3092\\(x-3\\)\u306b\u7f6e\u304d\u63db\u3048\u3066\u3001\\(y\\)\u3092\\(y-2\\)\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u30dd\u30a4\u30f3\u30c8<\/span><\/div><div class=\"cap_box_content\">\n<p>\\begin{eqnarray}<br>x &amp;\u21d2&amp; x-3\\\\<br>y &amp;\u21d2&amp; y-2\uff12<br>\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3059\u308b\u3068\u3001\u5e73\u884c\u79fb\u52d5\u3057\u305f\u5f0f\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\\[y-2=(x-3)^{2}\\]<\/p>\n\n\n\n<p>\u3053\u308c\u3092\u6574\u7406\u3057\u3066\u5e73\u884c\u79fb\u52d5\u306e\u5b8c\u6210\u3067\u3059\u3002<\/p>\n\n\n\n<p>\\[y=(x-3)^{2}+2\\]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b2\u3000\\(y=-2x^{2}\\)\u3092\u5e73\u884c\u79fb\u52d5<\/h3>\n\n\n\n<p>\u6b21\u306f\\(x^{2}\\)\u304c\u4fc2\u6570\u3092\u6301\u3064\u5834\u5408\u3067\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"474\" height=\"242\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d52.png\" alt=\"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d52\" class=\"wp-image-5522\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d52.png 474w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u4e8c\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d52-300x153.png 300w\" sizes=\"(max-width: 474px) 100vw, 474px\" \/><\/figure>\n<\/div>\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u4f8b\u984c2<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(y=-2x^{2}\\)\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(-2\\),\\(y\\)\u8ef8\u65b9\u5411\u306b\\(3\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u3002<\/p>\n<\/div><\/div>\n\n\n\n<p>\\(x\\)\u3092\\(x+2\\)\u306b\u7f6e\u304d\u63db\u3048\u3066\u3001\\(y\\)\u3092\\(y-3\\)\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u30dd\u30a4\u30f3\u30c8<\/span><\/div><div class=\"cap_box_content\">\n<p>\\begin{eqnarray}<br>x &amp;\u21d2&amp;x+3\\\\<br>y &amp;\u21d2&amp;y-3<br>\\end{eqnarray}<\/p>\n<\/div><\/div>\n\n\n\n<p>\\[y-3=-2(x+2)^{2}\\]<\/p>\n\n\n\n<p>\u3053\u308c\u3092\u6574\u7406\u3057\u3066\u3001<\/p>\n\n\n\n<p>\\[y=-2(x+2)^{2}+3\\]<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4f8b3\u3000\\(y=x^{2}+6x+4\\)\u3092\u5e73\u884c\u79fb\u52d5<\/h3>\n\n\n\n<p>\u6700\u5f8c\u306b\u3053\u3093\u306a\u554f\u984c\u3082\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u4f8b\u984c3<\/span><\/div><div class=\"cap_box_content\">\n<p>\\(y=x^{2}+6x+4\\)\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(-2\\),\\(y\\)\u8ef8\u65b9\u5411\u306b\\(3\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u3002<\/p>\n<\/div><\/div>\n\n\n\n<p>\u3053\u306e\u3068\u304d\u3001\\(y=x^{2}+6x+4\\)\u3092\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u65b9\u6cd5\u304c\uff12\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<ol class=\"wp-block-list\">\n<li>\u305d\u306e\u307e\u307e\u5e73\u884c\u79fb\u52d5<\/li>\n\n\n\n<li>\u5e73\u65b9\u5b8c\u6210\u3057\u3066\u304b\u3089\u5e73\u884c\u79fb\u52d5<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u65b9\u6cd51.\u305d\u306e\u307e\u307e\u5e73\u884c\u79fb\u52d5<\/h4>\n\n\n\n<p>\\(x\\)\u8ef8\u65b9\u5411\u306b\\(-2\\),\\(y\\)\u8ef8\u65b9\u5411\u306b\\(3\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3059\u308b\u306e\u3067\u3001<\/p>\n\n\n\n<p>\\begin{eqnarray}<br>\ny-3&amp;=&amp;(x+2)^{2}+6(x+2)+4\\\\<br>\ny&amp;=&amp;(x^{2}+4x+4)+6(x+2)+4+3\\\\<br>\ny&amp;=&amp;x^{2}+10x+23<br>\n\\end{eqnarray}<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u6c42\u3081\u308b2\u6b21\u95a2\u6570\u306f<\/p>\n\n\n\n<p>\\[y=x^{2}+10x+23\\]<\/p>\n\n\n\n<p>\u3060\u3068\u5206\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u65b9\u6cd52.\u5e73\u65b9\u5b8c\u6210\u3057\u3066\u304b\u3089\u5e73\u884c\u79fb\u52d5<\/h4>\n\n\n\n<p>\u3082\u3046\uff11\u3064\u306e\u3084\u308a\u65b9\u3068\u3057\u3066\u3001\u5e73\u65b9\u5b8c\u6210\u3057\u3066\u304b\u3089\u79fb\u52d5\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305a\u306f\\(y=x^{2}+6x+4\\)\u3092\u5e73\u65b9\u5b8c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\\begin{eqnarray*}<br>\ny&amp;=&amp;x^{2}+6x+4\\\\<br>\n&amp;=&amp;(x+3)^{2}-9+4\\\\<br>\n&amp;=&amp;(x+3)^{2}-5<br>\n\\end{eqnarray*}<\/p>\n\n\n\n<p>\u3053\u306e\u95a2\u6570\u304c\\(x\\)\u8ef8\u65b9\u5411\u306b\\(-2\\),\\(y\\)\u8ef8\u65b9\u5411\u306b\\(3\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3059\u308b\u306e\u3067<\/p>\n\n\n\n<p>\\(x\\)\u3092\\(x+2\\)\u306b\u7f6e\u304d\u63db\u3048\u3066\u3001\\(y\\)\u3092\\(y-3\\)\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>\\begin{eqnarray*}<br>\ny-3&amp;=&amp;(x+2+3)^{2}-5\\\\<br>\n&amp;=&amp;(x+5)^{2}-5+3\\\\<br>\n&amp;=&amp;x^{2}+10x+23<br>\n\\end{eqnarray*}<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u6c42\u3081\u308b2\u6b21\u95a2\u6570\u306f<\/p>\n\n\n\n<p>\\[y=x^{2}+10x+23\\]<\/p>\n\n\n\n<p>\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>2\u3064\u306e\u3084\u308a\u65b9\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u304c\u3001\u3069\u3061\u3089\u306e\u3084\u308a\u65b9\u3067\u3082\u540c\u3058\u5f0f\u306b\u306a\u308b\u306e\u3067\u5b89\u5fc3\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi7-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u5e73\u884c\u79fb\u52d5\u306e\u3084\u308a\u65b9\u304c\u5206\u304b\u3063\u3066\u304d\u307e\u3057\u305f\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"naze\">\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\uff1f<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1200\" height=\"655\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_1.webp\" alt=\"\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f\u3067\u7b26\u53f7\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308b\u7406\u7531\u3092\u3001\u5ea7\u6a19\u306e\u9006\u7b97\u30d7\u30ed\u30bb\u30b9\u3067\u793a\u3057\u305f\u89e3\u8aac\u56f3\" class=\"wp-image-21590\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_1.webp 1200w, https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_1-768x419.webp 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi6-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u3069\u3046\u3057\u3066(x)\u8ef8\u65b9\u5411\u306b(p)\u79fb\u52d5\u3055\u305b\u308b\u306e\u306b\u3001(x-p)\u304c\u51fa\u3066\u304f\u308b\u306e\uff1f<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi1-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30b7\u30fc\u30bf<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u3044\u3044\u8cea\u554f\u3060\u306d\uff01\u306a\u305c\u305d\u3046\u306a\u308b\u306e\u304b\u89e3\u8aac\u3059\u308b\u3088\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3057\u305f\u3068\u304d\u306b\u3001\u306a\u305c\\(x-p\\)\u306b\u306a\u308b\u306e\u304b\u7591\u554f\u306b\u601d\u3046\u65b9\u3082\u591a\u3044\u306f\u305a\u3002<\/p>\n\n\n\n<p>\u3072\u3087\u3063\u3068\u3059\u308b\u3068\u3001<\/p>\n\n\n\n<p>\u300c\\(p\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3057\u305f\u304b\u3089\u3001\\(x+p\\)\u306e\u307b\u3046\u304c\u7d0d\u5f97\u3067\u304d\u308b\u3093\u3060\u3051\u3069&#8230;\u300d<\/p>\n\n\n\n<p>\u3053\u3093\u306a\u4eba\u3082\u3044\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p><span class=\"huto\">\u25bd\u3053\u3053\u3067\u306f\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u3053\u3068\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/span><\/p>\n\n\n\n<p>\\(y=ax^{2}\\)\u306e\u30b0\u30e9\u30d5\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u306f<\/p>\n\n\n\n<p>\\[y=a(x-p)^{2}+q\\]<\/p>\n\n\n\n<p>\u3067\u3057\u305f\u306d\u3002<\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>\u3053\u3053\u306b2\u6b21\u95a2\u6570\\(y=f(x)\\)\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"394\" height=\"252\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f.png\" alt=\"\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f\" class=\"wp-image-5523\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f.png 394w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f-300x192.png 300w\" sizes=\"(max-width: 394px) 100vw, 394px\" \/><\/figure>\n<\/div>\n\n\n<p>\\(y=f(x)\\)\u306e\u30b0\u30e9\u30d5\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u3092\\(y=g(x)\\)\u3068\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"431\" height=\"270\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f\uff11.png\" alt=\"\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f\uff11\" class=\"wp-image-5524\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f\uff11.png 431w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f\uff11-300x188.png 300w\" sizes=\"(max-width: 431px) 100vw, 431px\" \/><\/figure>\n<\/div>\n\n\n<p>\u3053\u306e\u3068\u304d\\(y=f(x)\\)\u4e0a\u306e\u3068\u3042\u308b\u70b9\\((x,y)\\)\u306f\u3001\\(y=g(x)\\)\u4e0a\u306e\\((X,Y)\\)\u3078\u5e73\u884c\u79fb\u52d5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3064\u307e\u308a\u3001\u4ee5\u4e0b\u306e2\u3064\u304c\u6210\u308a\u7acb\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-style-bg_stripe\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>\\[X=x+p\\]<\/p>\n\n\n\n<p>\\[Y=y+q\\]<\/p>\n<\/div><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"446\" height=\"278\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f2.png\" alt=\"\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f2\" class=\"wp-image-5518\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f2.png 446w, https:\/\/math-travel.jp\/wp-content\/uploads\/2021\/05\/\u306a\u305c\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b\u306e\uff1f2-300x187.png 300w\" sizes=\"(max-width: 446px) 100vw, 446px\" \/><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u306f\u5f0f\u5909\u5f62\u3092\u3059\u308b\u3068<\/p>\n\n\n\n<p>\\begin{eqnarray}<br>\nx &amp;=&amp; X-p\\\\<br>\ny &amp;=&amp; Y-q<br>\n\\end{eqnarray}<\/p>\n\n\n\n<p>\u3068\u306a\u308a\u307e\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u5143\u306e2\u6b21\u95a2\u6570\\(y=f(x)\\)\u306b\u4ee3\u5165\u3059\u308b\u3068<\/p>\n\n\n\n<p>\\[Y-q=f(X-p)\\]<\/p>\n\n\n\n<p>\u3068\u306a\u308a\u3001<\/p>\n\n\n\n<p>\\[y=f(x-p)+q\\]<\/p>\n\n\n\n<p>\u304c\u6210\u7acb\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3068\u304d\u3001\\(x\\)\u306e\u90e8\u5206\u306b\u306f\\(x-p\\)\u304c\u4ee3\u5165\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u96e3\u3057\u3044\u8a71\u306a\u306e\u3067\u3088\u304f\u5206\u304b\u3089\u306a\u3044\u65b9\u306f\u3001<span class=\"hutoaka\">\u516c\u5f0f\u3060\u3051\u899a\u3048\u3066\u304a\u3051\u3070\u5927\u4e08\u592b\u3067\u3059\u3002<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"mondai\">\u5e73\u884c\u79fb\u52d5\u300a\u7df4\u7fd2\u554f\u984c\u300b<\/h2>\n\n\n\n<p>2\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3092\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u7df4\u7fd2\u3092\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u4eca\u56de\u306f\u4ee5\u4e0b\u306e3\u3064\u306e\u5f0f\u3092\u5e73\u884c\u79fb\u52d5\u3057\u3066\u3082\u3089\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"swell-block-capbox cap_box\"><div class=\"cap_box_ttl\"><span>\u7df4\u7fd2\u554f\u984c<\/span><\/div><div class=\"cap_box_content\">\n<p>\u6b21\u306e2\u6b21\u95a2\u6570\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b3\u3001y\u8ef8\u65b9\u5411\u306b-2\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u3092\u6c42\u3081\u3088\u3046\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\\(y=x^{2}\\)<\/li>\n\n\n\n<li>\\(y=-2x^{2}\\)<\/li>\n\n\n\n<li>\\(y=x^{2}+x+1\\)<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p class=\"h3modoki\">\\(y=x^{2}\\)\u306e\u5e73\u884c\u79fb\u52d5<\/p>\n\n\n\n<p>\\(y=x^{2}\\)\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b3\u3001y\u8ef8\u65b9\u5411\u306b-2\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u3068\u3001<\/p>\n\n\n\n<p>\\begin{eqnarray*}<br>\ny&amp;=&amp;(x-3)^{2}-2\\\\<br>\n&amp;=&amp;(x^{2}-6x+9)-2\\\\<br>\n&amp;=&amp;x^{2}-6x+7<br>\n\\end{eqnarray*}<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u6c42\u3081\u308b2\u6b21\u95a2\u6570\u306f\\(y=x^{2}-6x+7\\)<\/p>\n\n\n\n<p class=\"h3modoki\">\\(y=-2x^{2}\\)\u306e\u5e73\u884c\u79fb\u52d5<\/p>\n\n\n\n<p>\\(y=-2x^{2}\\)\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b3\u3001y\u8ef8\u65b9\u5411\u306b-2\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u3068\u3001<\/p>\n\n\n\n<p>\\begin{eqnarray*}<br>\ny&amp;=&amp;-2(x-3)^{2}-2\\\\<br>\n&amp;=&amp;-2(x^{2}-6x+9)-2\\\\<br>\n&amp;=&amp;-2x^{2}+12x-20<br>\n\\end{eqnarray*}<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u6c42\u3081\u308b2\u6b21\u95a2\u6570\u306f\\(y=-2x^{2}+12x-20\\)<\/p>\n\n\n\n<p class=\"h3modoki\">\\(y=x^{2}+x+1\\)\u306e\u5e73\u884c\u79fb\u52d5<\/p>\n\n\n\n<p>\\(y=x^{2}+x+1\\)\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b3\u3001y\u8ef8\u65b9\u5411\u306b-2\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u308b\u3068\u3001<\/p>\n\n\n\n<p>\\begin{eqnarray*}<br>\ny&amp;=&amp;(x-3)^{2}+(x-3)+1-2\\\\<br>\n&amp;=&amp;(x^{2}-6x+9)+(x-3)-1\\\\<br>\n&amp;=&amp;x^{2}-5x+5<br>\n\\end{eqnarray*}<\/p>\n\n\n\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u6c42\u3081\u308b2\u6b21\u95a2\u6570\u306f\\(y=x^{2}-5x+5\\)<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi7-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u304a\u304b\u3052\u3067\u5c11\u3057\u6163\u308c\u3066\u304d\u307e\u3057\u305f\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"matome\">2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u3000\u307e\u3068\u3081<\/h2>\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1200\" height=\"655\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_2.webp\" alt=\"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u306b\u304a\u3051\u308b\u7f6e\u304d\u63db\u3048\u30eb\u30fc\u30eb\u3092\u7c21\u6f54\u306b\u307e\u3068\u3081\u305f\u6bd4\u8f03\u56f3\u89e3\" class=\"wp-image-21591\" srcset=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_2.webp 1200w, https:\/\/math-travel.jp\/wp-content\/uploads\/2026\/03\/heikouidou-ill_2-768x419.webp 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n\n<p><span class=\"huto\">\u4eca\u56de\u306f2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/span><\/p>\n\n\n\n<div class=\"wp-block-group has-border -border02 is-style-bg_grid\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div id=\"kv\">\n        <p>\u5e73\u884c\u79fb\u52d5\u3057\u305f\u3044\u5f0f\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n      <\/div>\n      <div id=\"input\">\n        <div class=\"select-formula\">\n          <input type=\"radio\" id=\"one\" name=\"formula\" value=\"one\" checked>\n          <label>\u4e00\u6b21\u95a2\u6570<\/label>\n          <input type=\"radio\" id=\"two\" name=\"formula\" value=\"two\">\n          <label>\u4e8c\u6b21\u95a2\u6570<\/label>\n        <\/div>\n        <div class=\"select-one\">\n          <p>y=ax+b<\/p>\n          <div>\n            <p>\u4fc2\u6570\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            <div class=\"number-item\">\n              <label>a:<\/label>\n              <input type=\"number\" name=\"a1\" class=\"a1\">\n            <\/div>\n            <div class=\"number-item\">\n              <label>b:<\/label>\n              <input type=\"number\" name=\"a2\" class=\"a2\">\n            <\/div>\n            <div class=\"number-item\">\n              <input type=\"number\" name=\"a3\" class=\"a3\" id=\"one-a3\" value=\"0\">\n            <\/div>\n          <\/div>\n          <div>\n            <p>\u5e73\u884c\u79fb\u52d5\u306e\u79fb\u52d5\u91cf\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            <div class=\"number-item\">\n              <label>x:<\/label>\n              <input type=\"number\" name=\"n1\" class=\"n1\">\n            <\/div>\n            <div class=\"number-item\">\n              <label>y:<\/label>\n              <input type=\"number\" name=\"n2\" class=\"n2\">\n            <\/div>\n          <\/div>\n        <\/div>\n        <div class=\"select-two\">\n          <p>y=ax<sup>2<\/sup>+bx+c<\/p>\n          <div>\n            <p style=\"margin:10px 0;\">\u4fc2\u6570\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            <div class=\"number-item\">\n              <label>a:<\/label>\n              <input type=\"number\" name=\"a1\" class=\"a1\">\n            <\/div>\n            <div class=\"number-item\">\n              <label>b:<\/label>\n              <input type=\"number\" name=\"a2\" class=\"a2\">\n            <\/div>\n            <div class=\"number-item\">\n              <label>c:<\/label>\n              <input type=\"number\" name=\"a3\" class=\"a3\">\n            <\/div>\n          <\/div>\n          <div>\n            <p style=\"margin:10px 0;\">\u5e73\u884c\u79fb\u52d5\u306e\u79fb\u52d5\u91cf\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n            <div class=\"number-item\">\n              <label>x:<\/label>\n              <input type=\"number\" name=\"n1\" class=\"n1\">\n            <\/div>\n            <div class=\"number-item\">\n              <label>y:<\/label>\n              <input type=\"number\" name=\"n2\" class=\"n2\">\n            <\/div>\n          <\/div>\n        <\/div>\n        <div class=\"btn\">\n          <input type=\"button\" value=\"\u7b97\u51fa\" id=\"cal-btn\">\n        <\/div>\n      <\/div>\n      <div id=\"output\">\n        <div class=\"output-sentence\">\n          <span><span id=\"origin-formula\"><\/span><span id=\"intermediate-formula\"><\/span><\/span>\n          <span>x\u8ef8\u65b9\u5411\u306b<span id=\"amont-x\"><\/span>\u3001y\u8ef8\u65b9\u5411\u306b<span id=\"amont-y\"><\/span>\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u30b0\u30e9\u30d5\u306e\u516c\u5f0f\u306f<\/span>\n          <span id=\"output-formula\" class=\"bold\"><\/span><span>\u306b\u306a\u308a\u307e\u3059\u3002<\/span>\n        <\/div>\n        <div id=\"output-error\">\n          <p>a \u306e\u5024\u306f0\u4ee5\u5916\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n        <\/div>\n      <\/div>\n<\/div><\/div>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi8-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u8a08\u7b97\u306b\u56f0\u3063\u3066\u3044\u305f\u306e\u3067\u52a9\u304b\u308a\u307e\u3057\u305f\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p class=\"is-style-bg_stripe\">\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f<br>\\(y=ax^{2}\\)\u306e\u30b0\u30e9\u30d5\u3092\\(x\\)\u8ef8\u65b9\u5411\u306b\\(p\\)\u3001\\(y\\)\u8ef8\u65b9\u5411\u306b\\(q\\)\u3060\u3051\u5e73\u884c\u79fb\u52d5\u3055\u305b\u305f\u3082\u306e\u306f<br>\\[y=a(x-p)^{2}+q\\]<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -circle\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/math-travel.jp\/wp-content\/uploads\/2024\/05\/math-travel-hukidashi7-150x150.webp\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u9ad8\u6821\u751f<\/span><\/div><div class=\"c-balloon__body -speaking -border-on\"><div class=\"c-balloon__text\">\n<p>\u305f\u304f\u3055\u3093\u4f8b\u984c\u304c\u3042\u3063\u305f\u304b\u3089\u3088\u304f\u5206\u304b\u3063\u305f\u3088\uff01<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u30b0\u30e9\u30d5\u304c\u30a4\u30e1\u30fc\u30b8\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u3001\u6700\u5927\u5024\u30fb\u6700\u5c0f\u5024\u306e\u554f\u984c\u3082\u30b9\u30e0\u30fc\u30ba\u306b\u7406\u89e3\u3067\u304d\u308b\u3088\u3002<\/p>\n\n\n\n<p>\u6700\u5927\u5024\u30fb\u6700\u5c0f\u5024\u306e\u554f\u984c\u306f4\u3064\u306e\u30d1\u30bf\u30fc\u30f3\u3057\u304b\u306a\u3044\u306e\u3067\u3001\u6163\u308c\u3066\u3057\u307e\u3048\u3070\u5f97\u70b9\u306b\u3064\u306a\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>&nbsp;2\u6b21\u95a2\u6570\u3092\u7dcf\u5fa9\u7fd2\u3057\u305f\u3044\u65b9\u306f\u3053\u3061\u3089\u306e\u8a18\u4e8b\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u56de\u306f2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u306b\u95a2\u3059\u308b\u60a9\u307f\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002 &nbsp; \u30b0\u30e9\u30d5\u306e\u5f62\u3092\u4e00\u5207\u5909\u3048\u308b\u3053\u3068\u306a\u304f\u79fb\u52d5\u3055\u305b\u308b\u3053\u3068\u3092\u5e73\u884c\u79fb\u52d5\u3068\u3044\u3044\u307e\u3059\u3002 \u672c\u8a18\u4e8b\u3067\u306f2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002 \u306a\u305c\u5e73\u884c\u79fb\u52d5\u306e\u516c\u5f0f\u3067\u306f\u7b26\u53f7\u304c\u9006\u306b\u306a\u308b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5519,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[21,222],"tags":[22,10,11],"class_list":["post-5507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nizikansuu","category-math-1","tag-22","tag-a","tag-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u516c\u5f0f\u3092\u8a3c\u660e\uff01\u306a\u305c\u300c\u30de\u30a4\u30ca\u30b9\u300d\u306b\u306a\u308b\u306e\u304b\u7406\u7531\u3092\u89e3\u8aac<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/math-travel.jp\/math-1\/heikouidou\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2\u6b21\u95a2\u6570\u306e\u5e73\u884c\u79fb\u52d5\u516c\u5f0f\u3092\u8a3c\u660e\uff01\u306a\u305c\u300c\u30de\u30a4\u30ca\u30b9\u300d\u306b\u306a\u308b\u306e\u304b\u7406\u7531\u3092\u89e3\u8aac\" \/>\n<meta property=\"og:description\" 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