Respostas

2013-06-12T21:23:54-03:00

a=3 b=-5 c=-2

Δ = b² - 4.a.c
Δ = (-5)² - 4.3.(-2)
Δ = 25 - 12.(-2)
Δ = 25 - (-24)
Δ = 25 + 24
Δ = 49

x= -b ± √Δ / 2a
x= -(-5) ± √49 / 2.3
x= 5 ± 7/ 6

x' = 5+7/6
x' = 12/6
x' = 2

x''= 5-7/6
x''= -2/6 (simplifique)
x''= -1/3

Raízes: -1/3 e 2

3 4 3