若实数xy满足（x+y+2)(x+y-1)=0,则x+y的值是

若实数xy满足x-y+1 已知实数xy满足x+2y 已知实数xy满足 x+y-2 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若正实数x.y满足x+y=xy,则x+2y的最小值 若正实数x ,y满足2x+y+6＝xy.则xy的最小值. 若正实数x,y满足2x+y+6=xy,求xy的最小值. 若正实数X,Y满足2X+Y+6=XY,求XY的最小值. 若实数x、y满足x^2+y^2=1,则2xy/(x+y-1)的最小值为 若实数x、y满足x^2+y^2+xy=1,则x+y的最大值是多少? 若实数x.y满足x^2+y^2+xy=1,则x+y的最大值为 若实数x,y满足x^2+y^2+xy=1,则x+y的最大值是多少? 若实数x,y满足x^2+y^2+xy=1,则x+y的最大值是 若实数x,y满足x^2+y^2+xy=1,则x+y的最大值是___ 若实数xy满足（x+y+2)(x+y-1)=0,则x+y的值是 若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于? 若实数xy满足x-y+10,y 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y