Resposta :
Resposta:
x² - 2x - 3 = 0
a = 1
b = -2
c = -3
Delta:
Δ = b² - 4ac
Δ = (-2)² - 4 * 1 * (-3)
Δ = 4 + 12
Δ = 16
Bhaskara:
x = - b ± √Δ / 2a
x = - (-2) ± √16 / 2 * 1
x = 2 ± 4 / 2
x' = 2 - 4 / 2 = -2 / 2 = -1
x'' = 2 + 4 / 2 = 6 / 2 = 3
S = {-1, 3}