已知x2+y2-4x+6y+13=0,求x和y的值

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

已知x2+y2-4x+6y+13=0,求x和y的值
由x²+y²-4x+6y+13=0
得(x-2)²+(y+3)²=0
∴x-2=0,y+3=0
∴x=2,y=-3
m²+2mn+2n²-6n+9=0,则m/n²=?
由m²+2mn+2n²-6n+9=0
得(m+n)²+(n-3)²=0
∴m+n=0,n-3=0
∴n=3,m=-3
∴m/n²=(-3)/(3²)=-1/3

x是2，y是-3

x^2+y^2-4x+6y+13=0
(x^2-4x+4)+(y^2+6y+9)=0
(x-2)^2+(y+3)^2=0
所以，x=2,y=-3

x=2,y=3

x2+y2-4x+6y+13=0
(x-2)^2+(y+3)^2=0
(x-2)^2=0
(y+3)^2=0
(x-2)=0
x=2
(y+3)=0
y=-3若m²+2mn+2n²-6n+9=0，则m/n²=？ 再帮帮忙，我一定选你的答案为最佳答案，谢谢了m²+2mn+2n²-6n+9=0 ...

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x2+y2-4x+6y+13=0
(x-2)^2+(y+3)^2=0
(x-2)^2=0
(y+3)^2=0
(x-2)=0
x=2
(y+3)=0
y=-3

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