Respostas

2014-07-12T15:26:01-03:00
X² - 2 < 1
x² - 2 - 1 < 0
x² - 3 < 0
x² = 3
x = + - √3
2 3 2
2014-07-12T18:29:17-03:00
x² - 2 < 1
x
² < 1 + 2
x² < 3
x < √3

R: { x ∈ IR / x < √3} 
3 3 3