(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
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