因式分解:(1/4)a³-(1/2)a²-3a

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因式分解:(1/4)a³-(1/2)a²-3a
因式分解:(1/4)a³-(1/2)a²-3a

因式分解:(1/4)a³-(1/2)a²-3a
(1/4)a³-(1/2)a²-3a
=a(a²-2a-12)/4