作业帮化简分式(x-y+4xy/x-y)(x-y-4xy/x+y)的结果是 A.x^2-y^2 B.y^2-x^2 C.x^2-4y^2 D.4x^2-y^2
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化简分式(x-y+4xy/x-y)(x-y-4xy/x+y)的结果是 A.x^2-y^2 B.y^2-x^2 C.x^2-4y^2 D.4x^2-y^2
化简分式(x-y+4xy/x-y)(x-y-4xy/x+y)的结果是 A.x^2-y^2 B.y^2-x^2 C.x^2-4y^2 D.4x^2-y^2
化简分式(x-y+4xy/x-y)(x-y-4xy/x+y)的结果是 A.x^2-y^2 B.y^2-x^2 C.x^2-4y^2 D.4x^2-y^2
原式=[(x-y)²+4xy]/(x-y)*[(x+y)²-4xy]/(x+y)
=(x+y)²/(x-y)*(x-y)²/(x+y)
=(x+y)(x-y)
选A
这一类的就直接代一些简单的数，搞定。采纳哦！
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