x^3-7x^2+14x-8因式分解,急用
问题描述:
x^3-7x^2+14x-8因式分解,急用
答
x^3-7x^2+14x-8
=x^3-2x^2-5x^2+14x-8
=x^2(x-2)-(x-2)(5x-4)
=(x-2)(x^2-5x+4)
=(x-2)(x-1)(x-4)