Respostas

2014-07-16T14:03:30-03:00
- x² + 6x + 5 = 0  . (- 1)
x² - 6x - 5 = 0
Δ = (- 6)² - 4.1.(- 5)
Δ = 36 - 20
Δ = 56

x = 6 + - √ 56 / 2
x = 6 + - √ 2². 2. 7 / 2
x = 6 + - 2 √ 14 / 2
x = 3 + - √ 14

x ' = 3 + √ 14

x '' = 3 - √ 14