Question

Fórmula de Bhaskara
2x(ao quadrado)+x-1=0

Answer 1

2x² + x - 1 = 0
a = 2, b = 1, c = - 1

Δ = b² - 4ac
Δ = 1² - 4 . 2 . (- 1)
Δ = 1 + 8
Δ = 9 = 3²

x = (- b ± √Δ)/2a
x = (- 1 ± √3²)/2 . 2
x = (- 1 ± 3)/4

x' = (- 1 + 3)/4 = 2/4
x'' = (- 1 - 3)/4 = - 4/4 = - 1

S = {2/4, - 1}