Question

Qual resposta
X2+9×+08=0

Answer 1

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}

Espero ter ajudado. Valeu