Respostas

2014-06-05T14:33:42-03:00
Soma das raizes ⇒ x1 + x2 ⇔ - 7/6
:
x1 + x2 = - b/a
:
- 7/6 = -b/a
:
-7*a = 6* (-b) ⇒ -7*2 = -6b
:
-b = -14/ -6 ⇔ b = 14/6
:
Simplificando b = 7/3
: