Respostas

2013-09-08T11:23:46-03:00
(a - 2) -2( a + 2)
a² - 2.a.2+ 2² - 2.a -4
a² -6a= 0

Delta= b²-4.a.c
Delta= 36-4.1.0
Delta=36

x'= -b + Raiz de Delta / 2
x'= 4+6/ 2.1
x'= 10/2
x'=5

x''= -b + raiz de delta/ 2
x''= -2/ 2
x''= -1

Solução (5 e -1)
1 5 1