Respostas

2014-05-25T16:05:58-03:00
(x³-2x²) + (x+2x-1) . (x+1)
(x³-2x²) + (x²+x+2x²-1x-1)
x³-2x²+x²+1x+2x²-1x-1
x³ + 1x²  - 1