well lets say that your 4 roots are: (b) , (1/b) , (h) and (-h)
then you can get the four results:
(1).........(b)+(1/b)=-p
(2).........1-(h^2)=q
(3).........-(h^2)((b) +(1/b))=-r
(4).........-(h^2)=s
from these four results it is quite easy to get the 2 answers.....maybe you had some...