x2+y2+4x-6y+13=0,求x y

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x2+y2+4x-6y+13=0,求xyx2+y2+4x-6y+13=0,求xyx2+y2+4x-6y+13=0,求xyx2+y2+4x-6y+13=0（x^2+4x+4)+(y^2-6y+9)=0(

x2+y2+4x-6y+13=0,求x y
x2+y2+4x-6y+13=0,求x y

x2+y2+4x-6y+13=0,求x y
x2+y2+4x-6y+13=0
（x^2+4x+4)+(y^2-6y+9)=0
(x+2)^2+(y-3)^2=0
∴{x+2=0
y-3=0
解得{x=-2,y=3

x=-2，y=3

6x-4y=-13