若m²+2mn+2n²-6n+9=0,则m/n²的值为?

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若m²+2mn+2n²-6n+9=0,则m/n²的值为?
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若m²+2mn+2n²-6n+9=0,则m/n²的值为?
若m²+2mn+2n²-6n+9=0,则m/n²的值为?

若m²+2mn+2n²-6n+9=0,则m/n²的值为?
(m+n)^2+(n-3)^2=0
n=3
m=-3
m/n^2=-1/3

-1/3