Question

Resolva a equaçao do 2grau em r x²-9x+8=0

Answer 1

Resposta:

x² + 9x + 8 = 0

a = 1

b = 9

c = 8

Delta:

Δ = b² - 4ac

Δ = 9² - 4 * 1 * 8

Δ = 81 - 32

Δ = 49

      Bhaskara:

      x = - b ± √Δ / 2a

      x = - 9 ± √49 / 2 * 1

      x = - 9 ± 7 / 2

      x' = - 9 + 7 / 2 = -2 / 2 = -1

      x'' = - 9 - 7 / 2 = -16 / 2 = -8

S = {-8, -1}