已知xy=8满足x^2y-8xy^2-x+y=56,求x^2+y^2的值

已知x-xy=8,xy-y=-9,求x+y-2xy的值 已知xy=8满足x^2y-8xy^2-x+y=56,求x^2+y^2的值 已知XY=8,满足Xˇ2Yˇ-XYˇ2-X+Y=56,求Xˇ2+Yˇ2的值 已知xy=8满足x^2y-xy^2-x+y=56,求x^2+y^2的值 已知1/x+1/y=8,求2x-3xy+2y/x+2xy+y的值 已知xy为实数,且满足2x^2+4xy+4y^2+8x+12y+10=0,试求x+y的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 若x,y满足x^+2y^-2xy+1=0,求xy的值 正数xy满足x2-y2=2xy,求x+y分之x-y的值 已知X,Y为实数,且满足2X^2+4XY+4Y^2+8X+12Y+10=0,求x+y的值. 正整数x,y满足x2-y2=2xy,求x-y/x+y的值 整数x,y满足x2-y2=2xy,求x-y/x+y的值