Inspiration: 二次方程式(Quadratic Equations)の新しい解き方 corrected

ax² + bx + c = 0の新しい解き方をご紹介します。

The New York Timesの解説が次にあります。有料記事ですが、現在講読料は週0.5ドルと格安になっています。


This Professor’s ‘Amazing’ Trick Makes Quadratic Equations Easier






ax² + bx + c = 0に、r + s = –b、r*s=cの関係があることを前提として、二次関数のグラフがが左右対象であることを利用して、対象軸のx座標tを算出するのがポイントです。







About shibatau

I was born and grown up in Kyoto. I studied western philosophy at the University and specialized in analytic philosophy, especially Ludwig Wittgenstein at the postgraduate school. I'm interested in new technology, especially machine learning and have been learning R language for two years and began to learn Python last summer. Listening toParamore, Sia, Amazarashi and MIyuki Nakajima. Favorite movies I've recently seen: "FREEHELD". Favorite actors and actresses: Anthony Hopkins, Denzel Washington, Ellen Page, Meryl Streep, Mia Wasikowska and Robert DeNiro. Favorite books: Fyodor Mikhailovich Dostoyevsky, "The Karamazov Brothers", Shinran, "Lamentations of Divergences". Favorite phrase: Salvation by Faith. Twitter: @shibatau

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