Respostas

2014-02-08T10:28:30-02:00
X^2 - 3x - 2x + 6 = 6
x^2 - 5 x + 6 - 6 = 0
x^2 - 5x = 0
x(2x - 5) = 0
x=0


2x-5=0
x=5/2
1 5 1