Question

(X+5).(x+3) = 0 vhbhk Mn fuivhikbh

Answer 1

(X+5).(x+3) = 0 ↓

(X+5) = 0 => x'= -5

(x+3) = 0 => x"= -3

S: { -5 , -3 }

Answer 2

Resposta:

(x - 5) . (x + 3) > 0

x² + 3x - 5x - 15 > 0

x² - 2x - 15 > 0

x² - 2x - 15 = 0

Δ = b² - 4 . a . c

Δ = (-2)² - 4 . 1 . (- 15)

Δ = 4 + 60

Δ = 64

x = (-b ± √Δ)/2a

x = -(-2 ± √64)/2.1    

x' = 10 / 2     x'' = - 6 / 2

x' = 5             x'' = - 3

Explicação passo-a-passo: