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因式分解:x立方-xy平方-x+y
人气:119 ℃ 时间:2019-10-08 22:18:48
解答
x^3-xy^2-x+y
=x(x^2-y^2)-(x-y)
=x(x+y)(x-y)-(x-y)
=(x-y)(x^2+xy-1)
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