(2a方+1)(a-4)-(a+3)(a方+1)

问题描述:

(2a方+1)(a-4)-(a+3)(a方+1)

(2a方+1)(a-4)-(a+3)(a方+1)
=2a³-8a²+a-4-a³-3a²-a-3
=a³-11a²-7
在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.请问可不可以把-(a+3)(a方+1)的详细过程写一下?谢谢-(a+3)(a方+1)
=-(a³+3a²+a+3)
=-a³-3a²-a-3