(3a+2)(5a-2)+(1-4a)(a+4)=0 则a等于几
问题描述:
(3a+2)(5a-2)+(1-4a)(a+4)=0 则a等于几
答
(3a+2)(5a-2)+(1-4a)(a+4)=0
15a²+4a-4-4a²-15a+4=0
11a²-11a=0
11a(a-1)=0
a=0,a=1