Jawabanmu

2014-09-07T19:56:40+07:00
(2-a)(a²+1(3a+4)
=(2-a)(a²+3a+4)
=2a²+6a+8-a³-3a²-4a
=-a³-a²+2a+8
Mungkin maksudnya koefisian a² ya? Kalau iya, koefisien a² = -1