(X^2-2X+1)+(Y^2+6Y+9)=0(X-1)^2+(Y+3)^2=0两个非负数相加为0,那么只有X-1=0,Y+3=0X=1,Y= -3X+Y=1-3= -2
X^2-2X+Y^2+6Y+10=(X-1)^2+(Y+3)^2=0解得X=1,Y=-3X+Y=-2