已知xy为实数2x²+6xy+9y²-2x-1=0 x=?y=?

已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y 已知xy为实数2x²+6xy+9y²-2x-1=0 x=?y=? 已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy 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5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y 已知xy都是正实数且满足4x²+4xy+y²+2x+y-6=0则x（1-y）的最小值 已知xy为实数,且y=√x-½+√½-x+½,求5x+|xy-1|-√y²-2y 已知实数x,y满足2x²+6xy+9y²-2x+1=0,试求x,y的值. 已知X^2+Y^2+4X+6Y+13=0(X\Y为实数),则XY=_ 已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
已知X²+Y²+X²Y²-4XY+1=0 求:（X-Y)^2008-(XY)^2 2x+y+6=xy,xy为正实数,求xy最小值