Respostas

2013-10-23T11:32:53-02:00
X² - 12x + 20 < 0
2x - 12x + 20 < 0
2x - 12x < 0 - 20
10x < - 20 .(-1)
- 10x > 20
x > 20/10
x > -2
1 5 1