Respostas

2013-09-06T14:49:05-03:00
(2x+y+3) + (-5x+y-1)
     (-3x+2y+2)
(2x+y+3) + (-5x+y-1) +6
OU (2x+y+3) + (-5x+y-1) -6
oque vc prefirir
2013-09-06T14:51:59-03:00