由题意: x^2-2x+y^2+6y+10=0 即(x^2-2x+1)+(y^2+6y+9)=0 (x-1)^2+(y+3)^2=0根据非负数的性质:x-1=0,y+3=0即x=1,y=-3故x+y=-2看完了好评我哦~~