Respostas

2013-01-29T14:52:31-02:00

Solucão:

 

x² + 9x + 8 = 0
delta = (9)² - 4 (1)(8)
delta = 49

x' = -9 + 7 : 2
x' = 2/2 = 1

x" = -9 - 7 : 2
x" = -16/2
x" = -8

1 3 1