aの2乗+63=(a+3)の2乗
aの2乗+63=aの2乗+6a+9
aの2乗-aの2乗-6a=9-63
-6a=-54
a=9
間違えてたらごめんなさいT^T
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aの2乗+63=(a+3)の2乗
aの2乗+63=aの2乗+6a+9
aの2乗-aの2乗-6a=9-63
-6a=-54
a=9
間違えてたらごめんなさいT^T
Users viewing this question
are also looking at these questions 😉
ありがとうございます