Question

-x ao quadrado+6x+16=0

Answer 1

Resposta: -2 e 8

- x² + 6x + 16 = 0

a= -1

b = 6

c = 16

Δ = b² - 4c

Δ= 6² - 4.(-1).16

Δ = 36 + 64

Δ = 100

x' = (-b + √Δ) /2.a ∴ x' = (- 6 + √100)/2.(-1)∴ x' = (-6+10)/-2∴x' = 4/-2∴x'= -2

x'' = (-6 - 10)/-2 ∴ x'' = -16/-2∴x'' = 8

S= {-2,8}