2.分解因式:a(a-1)(a-2)-6
问题描述:
2.分解因式:a(a-1)(a-2)-6
答
a(a-1)(a-2)-6
=a^3-3a^2+2a-6
=a^2(a-3)+2(a-3)
=(a^2+2)(a-3)