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(x^2-y^2)/(xy-y^2/x+y)分式的乘除
人气:346 ℃ 时间:2019-10-11 07:28:34
解答
(x^2-y^2)/(xy-y^2/x+y)
=(x+y)(x-y)*(x+y)/y(x-y)
=(x+y)^2/y
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