Respostas

2013-10-16T18:43:40-03:00
Ponto máximo
-b/2a = x vetice
5x^2 -2x -3
-(-2)/2(5) = xv
2/10 =xv
2/5=xv
ponto mínimo 
 yv = -delta v/4a
yv= -2^2-4*5*(-3)/4*5
yv= 4+60/45
yv= 64/45