因式分解:a3-1(a的三次方减一)过程要详细

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因式分解:a3-1(a的三次方减一)过程要详细因式分解:a3-1(a的三次方减一)过程要详细因式分解:a3-1(a的三次方减一)过程要详细a³-1=a³-a²+a&sup

因式分解:a3-1(a的三次方减一)过程要详细
因式分解:a3-1(a的三次方减一)过程要详细

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

[a-1][a2+a+1]