Respostas

2013-09-16T15:39:20-03:00
Delta=b²-4ac --> 16-4(3)(1) = 16-12 = 4
delta = 4
-b+ou- raiz de delta / 2a
x´= 4+2/2=3  x´´=4-2/2 =1 
RAÍZES x´=3 ou x´´=1
Xv= -b/2a e Yv = -delta/4a
Xv ---> -b/2a = 4/2 = 2
Yv ---> -delta/4a = -4/4 = -1

X´= 3 E X´´= 1 
XV= 2 E YV= -1