计算最好过程哦(a-1)(a²+1)(a+1)-(a²-1)²

问题描述:

计算最好过程哦(a-1)(a²+1)(a+1)-(a²-1)²

(a-1)(a+1)(a²+1)-(a²-1)²
=(a²-1)(a²+1)-(a²-1)²
=(a²-1)(a²+1-a²+1)
=2(a²-1)