Respostas

2013-09-23T14:50:44-03:00
3x² - 2x + m = 0 
delta = b^2 - 4.a.c            
(- 2)^2 - 4.(3)(m) = 4 - 12 m < 0
=> m > 4/12
=> m > 1/3
2013-09-23T14:52:07-03:00
3x²+2x + m = 0 

x(3x +2) +m = 0 

3x+2 = 0

x= -2/3 

m= 0