Respostas

2014-05-06T11:28:55-03:00
(3X+1)+(X-2)-(X+1)=-1
4X+1-0=-1
5X-0=-1
6X
2014-05-06T11:29:15-03:00
X²+3x-1=-1
x²+3x = 0 
Bhaskara