Respostas

2014-09-02T15:13:17-03:00
X² - 8X  + 12 = 0
Δ = b² - 4 . a . c
Δ = (-8)² - 4 . 1 . 12
Δ = 64 - 48
Δ = 16 (Tira a raíz de 16)
Δ = 4

X = - b + e - √Δ/2 .a
X' = - (-8) + 4/2
X' = 12/2
X' = 6

X" = - (-8) - 4/2
X" = 4/2
X" = 2

V = {2, 6}