-4a^3+16a^2+12a因式分解"过程!

问题描述:

-4a^3+16a^2+12a因式分解"过程!

题目应该是 -4a^3+16a^2-12a吧?
-4a^3+16a^2-12a
=-4a(a^2-4a+3)
=-4a(a-1)(a-3)

-4a³+16a²+12a
=(-4a)(a²-4a-3)
=(-4a)(a²-4a+4-7)
=(-4a)[(a-2)²-7]
=-4a(a-2+√7)(a-2-√7)