计算(1-2a)(2a+1)(4a²+1)-1
问题描述:
计算(1-2a)(2a+1)(4a²+1)-1
答
=(4a^2-1)(4a^2+1)-1
=16a^2-2
=2(8a^2-1)
=2(4a+1)(4a-1)