{"provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/JedenTag/","blog_url":"https://jedentag.hatenablog.com/","url":"https://jedentag.hatenablog.com/entry/2017/11/28/232002","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjedentag.hatenablog.com%2Fentry%2F2017%2F11%2F28%2F232002\" title=\"\uff11\uff1d-1\u306f\u6210\u308a\u7acb\u305f\u305a\u2026 - \u7121\u7cd6\u306e\u65e5\u3005\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","author_name":"JedenTag","categories":[],"title":"\uff11\uff1d-1\u306f\u6210\u308a\u7acb\u305f\u305a\u2026","description":"0\u3067\u5272\u3063\u3066\u306f\u3044\u3051\u306a\u3044\uff01\uff01 X = 1\u3068\u3059\u308b\u3002 X^2 = X X^2 - 1 = X - 1 \uff03\u4e21\u8fba\u306b-1\u3092\u8ffd\u52a0 (X + 1)(X - 1) = X - 1 (X + 1) = X - 1 \uff03\u4e21\u8fba\u3092(X - 1)\u3067\u5272\u3063\u305f 1 = - 1 #X\u3092\u79fb\u9805\u3057\u305f \u539f\u56e0 A: (X - 1)\u3067\u5272\u3063\u3066\u3057\u307e\u3063\u305f\u306e\u304c\u554f\u984c\u3067\u3042\u3063\u305f\u3002\u3068\u3044\u3046\u306e\u3082X = 1\u3068\u4eee\u5b9a\u3057\u3066\u3044\u308b\u305f\u3081\u5272\u308b\u6570\u304c0\u3067\u3042\u308b\u3002\u3053\u3053\u3067\u6570\u5f0f\u306b\u77db\u76fe\u304c\u8d77\u304d\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u3002 \u300cX = 1\u300d\u3067\u3042\u308b\u306a\u3089\u3070\u300c1 = - 1\u300d\u304c\u6210\u308a\u7acb\u3064 \uff03\u4e0d\u6b63 \u300c1 = - 1\u300d\u304c\u6210\u308a\u7acb\u305f\u306a\u3044\u306a\u3089\u3070\u300cX = 1\u300d\u3067\u306f\u306a\u3044 \uff03\u78ba\u8a8d \u3088\u3063\u3066\u660e\u3089\u304b\u306b\u300cX = 1\u300d\u3067\u3042\u3063\u3066\u3082\u300c1 = - 1\u2026","version":"1.0","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/J/JedenTag/20171105/20171105234448.jpg","width":"100%","blog_title":"\u7121\u7cd6\u306e\u65e5\u3005","type":"rich","provider_name":"Hatena Blog","published":"2017-11-28 23:20:02"}