Mathematics
Junior High
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こうなる意味が全く分かりません、、
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(1) 2y-2+y-1 三北 =(z+1)y-1)
因数分解

Answers

✨ Best Answer ✨

(y−1)=Aとおいたらわかりやすいですよ。
x(y−1)+(y−1)
=xA+A
=A(x+1)〈←Aでくくる)
=(y−1)(x+1)

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