化简1/6m-4n-1/6m+4n-3m/4n^2-9m^2

化简1/6m-4n-1/6m+4n-3m/4n^2-9m^2
化简1/6m-4n-1/6m+4n-3m/4n^2-9m^2

化简1/6m-4n-1/6m+4n-3m/4n^2-9m^2
原式=(3m+2n-3m+2n+6m)/2(3m+2n)(3m-2n)
=2(3m+2n)/2(3m+2n)(3m-2n)
=1/(3m-2n)

1/(3m-2n)

=（1/6m-1/6m）+（4n-4n）-3m/4n^2-9m^2
=-3m/4n^2-9m^2
=-3m（1/4n^2+3m）

到分公司的分公司的风格