作业帮(3a²+2a-8)²-(a²-2a-8)²
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/10 03:10:55
(3a²+2a-8)²-(a²-2a-8)²
(3a²+2a-8)²-(a²-2a-8)²
(3a²+2a-8)²-(a²-2a-8)²
=[(3a²+2a-8)+(a²-2a-8)][(3a²+2a-8)-(a²-2a-8)]
=(3a²+2a-8+a²-2a-8)(3a²+2a-8-a²+2a+8)
=(4a²-16)(2a²+4a)
=8(a²-4)(a²+2a)
=8a(a-2)(a+2)²