4-x^2/x^2y-2xy分式化简
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4-x^2/x^2y-2xy分式化简4-x^2/x^2y-2xy分式化简4-x^2/x^2y-2xy分式化简(4-x^2)/(x^2y-2xy)=(2-x)(2+x)/xy(x-2)=-(2+x)/x
4-x^2/x^2y-2xy分式化简
4-x^2/x^2y-2xy分式化简
4-x^2/x^2y-2xy分式化简
(4-x^2)/(x^2y-2xy)
=(2-x)(2+x)/xy(x-2)
=-(2+x)/xy
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