Question

Resolva equação X elevada dois menos 2X -3 = 0

Answer 1

x² - 2x - 3 = 0

Δ = b² - 4ac

Δ = (2)² - 4(1)(-3)

Δ = 4 + 12

Δ = 16

x = - b ±√Δ / 2a

x = -(- 2) ± 4 / 2*(1)

x' = 2 + 4 / 2

x' = 6 / 2

x' = 3

x'' = 2 - 4 / 2

x'' = - 2 / 2

x'' = - 1