作业帮(xy^2-2xy+x)*y^3-y分之y^3+y^2
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(xy^2-2xy+x)*y^3-y分之y^3+y^2
(xy^2-2xy+x)*y^3-y分之y^3+y^2
(xy^2-2xy+x)*y^3-y分之y^3+y^2
(xy^2-2xy+x)*(y^3-y)分之(y^3+y^2)
=x(y^2-2y+1)*[y^2(y+1)]/[y^2(y-1)]
=x(y-1)^2*[y^2(y+1)]/[y^2(y-1)]
=x(y-1)(y+1)
(-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)]
已知X+Y分之XY等于3,求-X+3XY-Y分之2X-3XY+2Y
已知x+y分之xy=2,那么3x-5xy+3y分之3xy-x-y=
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
已知X+Y分之XY=2,求-X+3XY-Y分之3X+5XY+3Y
(xy^2-2xy+x)*y^3-y分之y^3+y^2
(xy^2-2xy+x)乘以y^3-y分之y^3+y^2
【xy分之（x^2+y^2)-(xy+y^2分之x^2)-(x^2+xy分之y^2)】÷xy分之3
已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值!
若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之
(x+2y-3xy+2x+y-xy)-(-2-y+xy),其中x+y=2分之1,xy=-2分之1
2x+2y分之3y+x^2+xy分之2xy
计算：2x+2y分之3y + x²+xy分之2xy
2x+2y分之3y+x方+xy分之2xy
2x+2y分之3y 加 x²+xy分之2xy
3xy³分之x²-4y²×x+2y分之xy
(xy-x^2)除以xy分之x-y