Question

Calcule o valor de :

Answer 1

f(x) = x² - 2x - 35

x² - 2x - 35 = 0

Δ = b² - 4ac

Δ = (-2)² - 4(1)(-35)

Δ = 4 + 140

Δ = 144

x = - b ± √Δ / 2a

x = 2 ± 12 / 2(1)

x' = 2 + 12 / 2

x' = 14/2

x' = 7

x'' = 2 - 12 / 2

x'' = - 10 / 2

x'' = - 5

Letra D.