Respostas

  • Usuário do Brainly
2014-06-26T18:20:35-03:00
3x² + 5x - 2 = 0
Δ = b² - 4 . a . c
Δ = 5² - 4 . 3 . (- 2)
Δ = 25 + 24
Δ = 49

x = (- b ± √Δ)/(2 . a)
x = (- 5 ± √49)/(2 . 3)
x = (- 5 ± 7)/6

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

x'' = (- 5 - 7)/6
x'' = - 12/6
x'' = - 6

S = {- 6, 1/3}