Respostas

2014-06-24T19:05:33-03:00
A³-3a²-4a
(-1)³-3.(-1)²-4.(-1)
-1-3+4 = 0
2 5 2
2014-06-24T19:09:21-03:00
A³-3a²-4a
-1³-3.-1²-4.-1
-1-3-4
4-4= 0