Question

X+5+ $\frac{4}{x}$=0

Answer 1

x + 5 + 4/x = 0          Primeiro multiplique tudo por x:
x² + 5x + 4 = 0 

Agr use a fórmula de Bhaskara: 

Δ = b² - 4ac
Δ = 5² - 4.1.4
Δ = 25 - 16
Δ = 9

x = -b +/- √Δ / 2a
x = -5 +/- √9 / 2.1
x = -5 +/- 3 / 2

x1 = -5 + 3/ 2 = - 2/2 = -1
x2 = -5 - 3 /2 = - 8/2 = -4

Bons estudos

Answer 2

x + 5 + 4/x = 0
x² + 5x + 4 = 0

Δ = b² -4ac
Δ = (5)² - 4.(1).(4)
Δ = 25 - 16
Δ = 9

x = -b +/- √Δ/2a
x = -5 +/- 3/2
x' = -1
x'' = -4