解方程：5x²+5y²+2xy+2y-2x+2=0

解方程：5x²+5y²+2xy+2y-2x+2=0
解方程：5x²+5y²+2xy+2y-2x+2=0

解方程：5x²+5y²+2xy+2y-2x+2=0
方程错了吧!是5x²+5y²+8xy+2y-2x+2=0吧!
5x方+5y方+8xy+2y-2x+2=0
即:4(x+y)^2+(x-1)^2+(y+1)^2=0
即:x+y=0,
且:x=1,y=-1
解为:x=1,y=-1