Respostas

2014-08-06T13:19:23-03:00
Xa + xb + xc /3 = gx
2 + 5 + (-1)/3 =6/3 = 2

ya+yb+yc/3 = gy

3+y+4/3=2

3+y+4=2.3
y= 6-3-4
y= -1