Question

x² + 4x + 4 = 0 ,, resolve por favor ....

Answer 1

Olá,

Resolução :

x² + 4x + 4 = 0

(x + 2)² = 0

x + 2 = ± √0

x + 2 = ± 0

x = -2 ± 0

x' = -2 + 0   ⇒ x' = -2

x'' = -2 - 0  ⇒ x'' = -2

S = {-2}

Bons Estudos!!

Answer 2

x² + 4x + 4 = 0

a = 1
b = 4
c = 4

Δ = b² - 4ac
Δ = (4)² - 4.(1).(4)
Δ = 16 - 16
Δ = 0

$x = \frac{-b \frac{+}{-} \sqrt{b^2-4ac} }{2a}$

$x = \frac{-4 \frac{+}{-} \sqrt{0} }{2}$

$x' = x" = \dfrac{-4 }{2}$

$x' = x" = - 2$