(3a²)的三次方-6a的三次方(2a次方+3a²+a)

问题描述:

(3a²)的三次方-6a的三次方(2a次方+3a²+a)

(3a²)3 -6a3 (2a3+3a²+a)
 
=27a6 -12a6-18a5-6a4
 
=15a6 -18a5-6a4
 
=3a4(5a2-6a-2)