因式分解:a3-1(a的三次方减一)过程要详细
问题描述:
因式分解:a3-1(a的三次方减一)过程要详细
答
a³-1
=a³-a²+a²-1
=a²(a-1)+(a-1)(a+1)
=(a-1)(a²+a+1)