若x+y=2,且(x+2)(y+2)=5,则计算xy=_;3x^2+xy+3y^2=_
若x+y=2,且(x+2)(y+2)=5,则计算xy=_;3x^2+xy+3y^2=_
计算:已知x+y=2xy,求(4x-5xy+4y)/(xy-x-y)的值【=-=速回O(∩_∩)O谢谢】
若x-y=5,xy=6,则x^2y-xy^2=_,x^2+xy^2=__
已知x/1-Y/1=3,则分式x-2xy-y/2x+3xy-2y的值为_
已知X^2+Y^2+4X+6Y+13=0(X\Y为实数),则XY=_
已知1 _ 1 =5 求 2x+3xy-2y的值
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
若3x^2+3xy=0且xy不等于0,则x:y=
已知x-y=4xy,则2x+3xy-2yx-2xy-y
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )