已知实数x,y满足√x-2 + （y+1）²=0,则x-y=多少?

已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 已知实数x、y满足-1 已知实数x,y满足：1 已知实数X,Y满足2 已知实数xy满足x+2y 已知实数xy满足 x+y-2 已知实数x,y满足y=|x-1|,则x+2y的最大值是 已知实数x,y满足y=|x-1|若x+2y 已知实数x.y满足(x+2)^2+y^2( 已知实数x,y满足：y 已知实数x,y满足x-ay-1>=0,2x+y>=0,x 已知实数x,y满足√x-2 + （y+1）²=0,则x-y=多少? 已知实数x,y满足2/x-y+3/+√3x-y-1＝0,求实数x,y的值 已知实数x,y,满足x-√x-1=√y+3-y,则x+y最大值是? 已知实数x,y满足(x+y)^2=1,(x-y)^2=25,求x,y的值 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 已知实数x,y满足y=x^2-2x+2(-1