Mathematics
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9b−9−3ab+aの二乗
の答えと解説をお願いします!!!!!!

因数分解

Answers

✨ Best Answer ✨

(与式)
=a²-3ab+9b-9
=a²-9-3ab+9b
=(a+3)(a-3)-3b(a-3)
=(a-3)(a-3b+3)

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