Mathematics
Senior High
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何故{1+2(x−1)}になるのですか?(二乗はどこにいったのですか?1はどこからきたのですか?)
十x)
25 (1) x-1+2(x-1)°
= (x-1)+2(x-1)?
= (x-1){1+2(x-1)}
= (x-1)(2.x-1)
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1ってどこからきたのですか?