Respostas

2014-08-09T19:00:52-03:00
Y² - 6y - 3 = 0
Δ = (- 6)² - 4.1.(- 3)
Δ = 36 + 12
Δ = 48

x = 6 + - √ 48 / 2
x = 6 + - √ 2² . 2² . 3 / 2
x = 6 + - 4 √ 3 / 2
x = 3 + - 2 √ 3

x ' = 3 + 2 √ 3  = 5 √ 3

x '' = 3 - 2 √ 3 = √ 3