Question

quanto e essa equaçao do 2 grau x elevada a 2-4x-5=0

Answer 1

Oi

x² - 4x - 5 = 0

x² - 4x = 5

x² - 4x + 4 = 5 + 4

(x + 2)² = 9

x + 2 = 3
x = 1

x + 2 = -3
x = -5

S = (-5, 1)

.