Since p and q are roots of the equations then

Sum of the roots is p + q = = – (p) = – p

Here a = 1, b = p and c = q

Products of the root = p × q = = q

∴ p × q = q

p = 1

Putting value of ‘p’ in p + q = – p

1 + q = – 1

q = – 2