Question

if p=q=9 , pq=20 then what is p-q

Answer 1

Answer:

Given

p=Q=9

pq=20

now....

pq-p=20-9=11

Answer 2

Answer:

It is given that,

p=q=9

pq=20

Therefore,

p-q=9-9..........(since p=q=9)

=0