7x^3-6x^2-7x+6 因式分解
问题描述:
7x^3-6x^2-7x+6 因式分解
答
7x^3-6x^2-7x+6=(7x^3-6x^2)-(7x-6)
=x^2(7x-6)-(7x-6)=(7x-6)(x^2-1)
=(7x-6)(x+1)(x-1)