(3a²+2a-8)²-(a²-2a-8)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 05:59:02
![(3a²+2a-8)²-(a²-2a-8)²](/uploads/image/z/1710273-57-3.jpg?t=%283a%26%23178%3B%2B2a-8%29%26%23178%3B-%28a%26%23178%3B-2a-8%29%26%23178%3B)
(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