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数学
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因式分解,①2(a-b)²-(b-a)②(a+b)²-(a+b)
人气:246 ℃ 时间:2020-04-18 20:12:57
解答
①2(a-b)²-(b-a)=2(b-a)²-(b-a)=(b-a)(2b-2a-1)
②(a+b)²-(a+b)=(a+b)(a+b-1)
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