Respostas

2014-05-07T15:53:48-03:00
A=4. b=19. c=-5
Delta= b^2 - 4ac
361+80=441
Encontrando as raízes:
X=-b+-raiz de delta/2a

X=-19+-21/8

X1=2/8=1/4
X2=-40/8=-5

A soma do inverso:
4 - 1/5=20-1/5
=19/5
Letra B