Mathematics
Senior High
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こういう公式って全部暗記しないといけませんか？
| [和の平方]
1
(ヶ-のーー2g6二が [差の平方] 1
2 (e+の(c--の=〆ーが 【和と差の積 %G
2 (x+のG+の=x+(g二の)zTg6 |
4 (gzxすの(cx+の=gcr (gg二pc)x十6g
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そのとおりだと自分も思う