Question

If p and q are the roots of the equation x2 + px + q = 0, then

p = 1, q = -2
p = -2, q = 1
p = -2, q = 0
p = 0, q = 1

Answer 1

Answer:

Step-by-step explanation:

Given S = p + q = – p and product pq = q

This implies, q(p – 1) = 0 i.e. q = 0, p = 1

Now If q = 0 then p = 0, this implies p = q

If p = 1, then p + q = – p

q = – 2p

q = – 2(1)

q = – 2

The correct option is A.

Answer 2

Answer:

solving the equation

Step-by-step explanation:

p=1

q=-2