Respostas

2014-05-31T18:30:20-03:00
Olá, Alscesum!

x² + 6x + 5 = 0
a = 1
b = 6
c = 5
Δ = b² - 4ac
Δ = 6² - 4.1.5
Δ = 36 - 20
Δ = 16

-b +- raiz de delta / 2.a
-6 +- raiz de 16 / 2.1
-6 +- 4/2

Tiraremos x' e x'':

x'
-6 + 4/2 = -2/2 = -1

x''
-6 - 4/2 = -10/2 = -5
2014-05-31T18:31:36-03:00