Respostas

2013-07-05T09:32:56-03:00
(3a-1,5x).(0,7a - 5x)

2,1 a^2 -5ax - 1,05ax + 7,5 x^2

9,6 x^2 - 6,05 ax

(2x+1) (-6x²-2a+1)

-12x^3 - 4ax + 2x - 6x^2 - 2a +1

-12x^3 - 6x^2 - 4ax + 2x - 2a +1

confere?
9 3 9