已知实数x、y满足x²+y²-xy+2x-y+z=0,试求x、y的值

已知实数x、y满足x²+y²-xy+2x-y+z=0,试求x、y的值 已知实数x,y,z,满足x+y=5,z²=xy+y=9,求x+2y+3Z的值 已知实数x,y,z满足x²-6xy+10y²+4y+|z²-3z+2|+4=0,求(x+y 已知实数x、y满足x²﹢y²-xy+2x-y+1=0,试求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x×x+y×y-xy+2x-y+1=0 试求x y的值 已知实数x,y,z满足x-y=5,z^2=-xy-y-9,求x-2y+3z的值 已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值 已知实数x,y,z,满足那么x+y=6,z^2=xy-9,求(x+y)^z 已知实数x,y满足2x²+6xy+9y²-2x+1=0,试求x,y的值. 已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值. 已知实数x,y,z满足x=6-y,z^2-4z+4=xy-9,求x,y,z的值