计算(a三次方-a)/(a²+2a+1)

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计算(a三次方-a)/(a²+2a+1)
计算(a三次方-a)/(a²+2a+1)

计算(a三次方-a)/(a²+2a+1)
(a三次方-a)/(a²+2a+1)
=a(a²-1)/(a+1)²
=a(a-1)(a+1)/(a+1)²
=a(a-1)/(a+1);
如果本题有什么不明白可以追问,

(a三次方-a)/(a²+2a+1)
=a(a²-1)/(a+1)²
=a(a-1)/(a+1)