Question

分式约分x/x^2y-y÷x^2y/x^2+x.（xy-x^2)乘xy/x-y

Answer 1

x/x^2y-y÷x^2y/x^2+x

=(x-y)/(x²y)×(x²+x)

=(x-y)(x+1)/(xy);

（xy-x^2)乘xy/x-y

=x(y-x)xy/(x-y)

=-x²y;

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