因式分解:(x2-2x-2)(x2-2x+4)+9.
问题描述:
因式分解:(x2-2x-2)(x2-2x+4)+9.
答
(x2-2x-2)(x2-2x+4)+9
=(x2-2x)2+2(x2-2x)+1
=(x2-2x+1)2
=(x-1)4.