Question

已知3m+n=0求n^2/n^2+m^2+m^2/m^2-n^2

Answer 1

3m+n=0;

n=-3m;

n^2/n^2+m^2+m^2/m^2-n^2

=9m²/10m²+m²/(-8m²)

=9/10-1/8

=36/40-5/40

=31/40;

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