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(X3-2x2y+xy2)÷(x3-xy2)要求约分
人气:127 ℃ 时间:2020-02-04 04:01:46
解答
(X3-2x2y+xy2)÷(x3-xy2)
=x(x2-2xy+y2)/[x(x2-y2)]
=(x-y)2/[(x-y)(x+y)]
=(x-y)/(x+y)
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