Question

a equação X2 - 6x - 16 = 0​

Answer 1

X² - 6x - 16 = 0​

• a = 1 ; b = -6 ; c = -16

• Δ = b² - 4ac
• Δ = (- 6)² -4 * 1 * (-16)
• Δ = 36 + 64
• Δ = 100
• x = - b+ ou _ √Δ / 2a

• x' = - (-6) + √100 / 2*1
• x' = 6 +10 / 2
• x' = 16 / 2
• x' = 8

• x" - (-6) - √100 / 2*1
• x" = 6 - 10 / 2
• x" = -4 / 2
• x" = -2

Resposta:

• S={8,−2}