Mathematics
Senior High
Resolved
2acじゃだめですか?
問題には次の式を展開せよと書かれています
17 公式(a+6+c)° = α°+6°+c+2ab
+26c+2ca を用いる。
三
+2.(-6).c+2.c.a
= α°++c2-2ab-26c+2ca
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そーなんですね!ありがとうございます!