因式分解:-4m^2-9n^2+12mn

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因式分解:-4m^2-9n^2+12mn因式分解:-4m^2-9n^2+12mn因式分解:-4m^2-9n^2+12mn-4m^2-9n^2+12mn=-(4m^2-12mn+9n^2)=-(2m-3

因式分解:-4m^2-9n^2+12mn
因式分解:-4m^2-9n^2+12mn

因式分解:-4m^2-9n^2+12mn
-4m^2-9n^2+12mn
=-(4m^2-12mn+9n^2)
=-(2m-3n)^2

-(2m-3n)^2