Mathematics
Senior High
なぜ+1が出てくるのですか?
38 次の式を因数分解せよ。
ab²-ab-6a+b-3
= a (b²-b-6) + (6-3)
a (b+2)(b-3) + (6-3)
= {a (b+2)+1} (6-3)
= (ab+2a+1) (6-3)
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なるほどですね!分かりました!!