因式分解:x3-3x2+4.
问题描述:
因式分解:x3-3x2+4.
答
x3-3x2+4
=x3-2x2-x2+4
=x2(x-2)-(x+2)(x-2)
=(x-2)(x2-x-2)
=(x-2)(x-2)(x+1).