Question

Como resolver essa equação x2 + 9 x + 8 = 0

Answer 1

Resposta:

x1 = (–1)

x2 = (–8)

Explicação passo-a-passo:

x² + 9x + 8 = 0

Se ax² + bx + c = 0, então:

Fórmula de Bhaskara:

x = (–b ± √(b² – 4ac)) / 2a

x = (–9 ± √(9² – 4(1)(8))) / 2(1)

x = (–9 ± √(81 – 32)) / 2

x = (–9 ± √49) / 2

x = (–9 ± √7²) / 2

x = (–9 ± 7) / 2

x1 = (–9 + 7) / 2

x1 = (–2) / 2

x1 = (–1)

x2 = (–9 – 7) / 2

x2 = (–16) / 2

x2 = (–8)