Mathematics
Senior High

なんで1が急に現れたんですか?

(2) 2a²b-3ab+a-2b-2 =(2a²-3a-2)b+a-2 = (a-2X2a +1b+(a-2) = (a−2){(2a + 1)b +} = (a− 2)(2ab+b+1)
因数分解

Answers

4行目の初めのところで(a-2)で括っているからだと思います

お腹すいた

ありがとうございます😊

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