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)
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ありがとうございます😊