Respostas

2013-06-10T21:28:35-03:00

D(x) = 5ax - 10x - 9a ≠ 3ax - 8x - 12a

D(x) = 5ax - 3ax -10x + 8x - 9a +12a

D(x) = 2ax -2x +3a

4 3 4