下列各分式中,是最简分式的是（ ）A 34(x-y)/85(x+y) B y^2-x^2/x+yC

发布时间：2021-03-05 13:38:21

下列各分式中,是最简分式的是（ ）A 34(x-y)/85(x+y) B y^2-x^2/x+yC x^2+y^2/x^2y+xy^2 D x^2-y^2/(x+y)^2

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A======以下答案可供参考======
供参考答案1:
CA 34(x-y)/85(x+y)
=2(x-y)/5(x+y)
B y^2-x^2/x+y
=(x+y)(x-y)/x+y
=x-yD x^2-y^2/(x+y)^2
=(x+y)(x-Y)/(x+y)^2
=x-y/x+y
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