Ответ:
(a2+1) (a+1) (a-1) =(2a+1) (a+1) (a-1) =(2a+1) (a²-1) =2a³-2a+a²-1=2a³+a²-2a-1
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Ответ:
(a2+1) (a+1) (a-1) =(2a+1) (a+1) (a-1) =(2a+1) (a²-1) =2a³-2a+a²-1=2a³+a²-2a-1