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(a-b)(x-y)-(b-a)(x+y)的因式分解!请马上回答,
人气:396 ℃ 时间:2020-03-23 23:14:20
解答
1013483689 :
(a-b)(x-y)-(b-a)(x+y)
=(a-b)(x-y)+(a-b)(x+y)
=(a-b)(x-y+x+y)
=2x(a-b)
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