已知xy=-50,x+y=5之1,则x^2y+xy^2=
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知x+y=1,xy=1/5,则x^2y=xy^2
已知x-y=4xy,则2x+3xy-2yx-2xy-y
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+x(xy+y)的值
已知x(x-1)-(x^2-y)=-3求(二分之y-x+2xy)-xy 快,
已知:xy+x=-1,xy-y=-2.
已知x+y=5,xy=2则x^2y+xy^2=( )
已知x+y=5,xy=-3,则x^2y+xy^2,
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+2(xy+y)的值
已知X+Y=-1,xy=-2,求代数式-5(x+y)+(x-y)+(xy+y)的值
已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值
已知xy^2=-2,求-xy(x^2y^5-xy^3-y)的值.