Respostas

2013-11-05T14:58:40-02:00
2x^2 = - 12x - 18
2x^2 + 12x + 18 = 0
a= 2; b= 12; c=18
Delta = b^2 - 4 a.c
12^2 - 4 (2).(18) = 144 - 144 = 0
x= -b +ou- raiz de 0 tudo sobre 2 (a)
x= -12 + ou - 0 sobre 4
x'= -12/4= -3
x"= -12/4= -3                      S {-3}
 
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2013-11-05T15:22:35-02:00