解:xy-x)^2÷(让老知x-y/xy=x²(y-1)²×xy/x-y=x³含茄y(y-1)²坦消/x-y希望你明白
解:原物橡式=x²(y-1)²÷(x-y)/做宴xy=x²罩胡旁(y-1)²×(xy)/(x-y)=x³(y-1)²y/(x-y)
原式=X^2(Y-1)^2/(x^2-1)/x =x^3(y-1)^2/x^2-1)