Mathematics
Junior High
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式を因数分解する問題で画像の答え方は丸ですか?

4 px-x+p-1 = (px-x)+(p-1) = x(p-1)+(p-1) == (p-1)(x+1) (別解)=px+p-x-1 = p(x+1)-(x+1) = (x+1)(p-1)
④x(P-1)+p-1 P-1をMとおく XM+M M(x+1) (P-1)(x+1)

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