Question

Resolva As Equaçoes Reais d) /x2-4x-1/=-3

Answer 1

x² + 5x + 4 = 0
        Δ= 5² - 4 * 1 * 4
        Δ = 25 - 16
        Δ = 9
              x = - 5 ± √9 / 2 * 1
              x' = - 5 + 3 / 2 = -2 / 2 = -1
              x'' = - 5 - 3 = -8 / 2 = -4