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(x-y)²-8(x-y-2) 因式分解
人气:361 ℃ 时间:2020-02-04 22:16:28
解答
(x-y)^2-8(x-y-2)
=(x-y)^2-8(x-y)+16
=[(x-y)-4]^2
=(x-y-4)^2
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