Mathematics
Junior High

4M2乗+4M+1
から下がなぜこうなるのかが分かりません。
説明お願いします🙇

Answers

4M^2+4M+1 a^2+2ab+b^2=(a+b)^2より
(2M+1)^2 Mをa+bに戻す
{2(a+b)+1}^2 分配して
(2a+2b+1)^2 

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