已知1/x+1/y=5,则2x-5xy+2y/x+2xy+y详解

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1/x+1/y=5,则2x-5xy+2y/x+2xy+y 已知1/x+1/y=5,则2x-5xy+2y/x+2xy+y详解 已知1/x=3+1/y,则(2x-5xy-2y)/(y+3xy-x)=_______. 已知1/x-1/y=5,则2x+3xy-2y/y+2xy-x 已知1/x-1/y=-3,则x+5xy-y/3x-2xy-3y= 已知2/X-1/Y=3,则(X-2Y-XY)/(5XY+6Y-3X)=? 已知2/x-1/y=3,则(2y-x+4xy)/(3x-6y-5xy)=? 已知1/X-1/Y=5 ,则x-2xy-y/4x+3xy-4y 已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+x(xy+y)的值 已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+2(xy+y)的值 1 已知1/X+1/Y=1/X+Y 则 Y/X+X/Y=2 已知1/X-1/Y=5,则3X+5XY-3Y/X-3XY-Y= 已知x+y=1,xy=-2,则x²y+xy²-2xy 已知x+y=5,xy=-1,则（3x-4y+2xy）-（2x-5y+5xy）=? 已知x+y=5,xy=-1,则（3x-4y+2xy)-(2x-5y+5xy)=_______ 【数学】已知 1/x-1/y=3 求 5x-xy-5y / x-2xy-y=?已知 1/x=1/y 求 2x-3xy-2y / x-2xy-y=? 已知x/1-y/1=3,则5x+xy-5y/x+2y-y的值为