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因式分解:(x-2y)^2-(2x-y)^2帮我算一下
(x-2y)^2-(2x-y)^2
人气:154 ℃ 时间:2020-04-15 04:56:36
解答
(x-2y)^2-(2x-y)^2
=(x-2y+2x-y)(x-2y-2x+y)
=(3x-3y)(-x-y)
=-3(x-y)(x+y)
=-3(x^2-y^2)
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