Respostas

2014-06-02T10:00:44-03:00
- x2 + x + 12 = 0
delta = b2 - 4 . a . c
delta = 1 - 4 . (-1) . 12
delta = 1 + 48
delta = 49

x = - b + ou - raiz quadrada de delta / 2 . a
x' = - 1 + 7 / 2 . (-1)
x' = -1 +7 / - 2
x' = 6 / - 2
x' = - 3

x" = - 1 - 7 / 2 . ( - 1)
x" = - 8 / - 2
x" = 4
4 5 4