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(x-y)(x-2y)-6y^2 因式分解
人气:315 ℃ 时间:2020-01-26 12:19:32
解答
(x-y)(x-2y)-6y^2
=x^2-2xy-xy+2y^2-6y^2
=x^2-3xy-4y^2
=(x+y)(x-4y)
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