分解因式a3-3a+2
问题描述:
分解因式a3-3a+2
答
原式=a³-3a+2
=a³-a-2a+2
=a(a²-1)-2(a-1)
=a(a-1)(a+1)-2(a-1)
=(a-1)(a²+a-2)
=(a-1)²(a+2)