(4-a²)(a-2)+(a²+6a+9)(2a+6)+2a=1先化简再求值

分类: 作业答案 • 2021-12-20 11:17:12

问题描述：

(4-a²)(a-2)+(a²+6a+9)(2a+6)+2a=1先化简再求值
(4-a²)(a-2)+(a²+6a+9)(2a+6)+2 a=1

答

(4-a²)(a-2)+(a²+6a+9)(2a+6)+2
=(a-2）²(a+2)+(a+3）²2*（a+3)+2
=(a-2）²(a+2)+2(a+3）³+2
=(1-2）²(1+2)+2(1+3）³+2
=3+2*4³+2
=133