已知㎡-3m+1=0,㎡=3m-1那么4㎡-9m-2+9/1+㎡=4（3m-1)-9m-2 +9/(1+3m-1)=12m-4-9m-2 + 3/m=3m-6 + 3/m=(3m^2-6m+ 3)/m=(3(3m-1)-6m+ 3)/m=(9m-3-6m+ 3)/m=3m/m=3
阿坝柴达木
(4m2-9m-2+9)/(1+m2)是这个意思吗
6m+2
