Question

$x {2} - 2x - 3 = 0$
​me ajudem por favoooor

Answer 1

Resposta:

x² - 2x - 3 = 0

Coeficientes:

a = 1

b = - 2

c = - 3

Delta:

∆ = b² - 4ac

∆ = (- 2)² - 4 • 1 • (- 3)

∆ = 4 + 12

∆ = 16

Bhaskara:

x = -b±√∆/2a

x = -(- 2)±√16/2•1

x = 2±4/2

x = 2+4/2 = 6/2 = 3

x = 2-4/2 = - 2/2 = - 1

S {x₁ = - 1 , x₂ = 3}