Respostas

2013-09-09T17:30:53-03:00
X' ≠ x'' ==> ∆ > 0
b2 - 4ac > 0 

(2m - 3 )2 - 4.1.(m2 + 3)>0
4m2 -12m +9 - 4m2 - 12  > 0
-12m - 3 > 0 (-1)
12m < -3
m < -3/12 
m < - 1/4  ==> Resp. b)