[2x(x^2y-Xy)+Xy(xy-x^2)]÷x^2y,其中x =2012,y=2013

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[2x(x^2y-Xy)+Xy(xy-x^2)]÷x^2y,其中x =2012,y=2013
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[2x(x^2y-Xy)+Xy(xy-x^2)]÷x^2y,其中x =2012,y=2013
[2x(x^2y-Xy)+Xy(xy-x^2)]÷x^2y,其中x =2012,y=2013

[2x(x^2y-Xy)+Xy(xy-x^2)]÷x^2y,其中x =2012,y=2013
[2x(x^2y-Xy)+Xy(xy-x^2)]÷x^2y,
=【2x^3y-2x^2y-x^2y^2-x^3y】÷x^2y
=[x^3y-2x^2y-x^2y^2]÷x^2y
=x-2-y
=x-y-2
=2012-2013-2
=-1-2
=-3

[2x(x^2y-xy^2)+xy(xy-x^2)]÷(x^2y)
=[2x*xy（x-y）+xy*x（y-x）]÷(x^2y)
=[2x^2*y(x-y)-x^2*y(x-y)]÷(x^2y)
=x^2*y(x-y)÷(x^2y)
=x-y
=2012-2013
=-1

x^2-xy/xy-y^2约分 2x²y-3(2xy-xy)-xy （x^2+xy/x-y)/（xy/x-y)计算 (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) .(x+y-2)(x+y-2xy)+(xy-1)^2 (x^2-xy)y÷y-x/xy怎么做? (xy-x²)÷(x²-2xy+y²/xy)×（x-y/x²） x-y/x²÷x²-2xy+y²/xy*（xy-x²） 3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） （y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy) 初二数学化简分式x^2 -y^2/xy - xy-y^2/xy-x^2x^2 -y^2/xy - xy-y^2/xy-x^2 xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 ((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy) 【x(xy-xy)-y(x-xy)】÷3xy 约分:x*2+xy/x*2+2xy+y*2 计算：3xy[2xy-x（y-2）+x]