Question

Multiply: (p+q)(p-q)
which one is the correct answer
p2+q2
p2-q2
p-q
​

Answer 1

Answer:

(p+q)(p-q)

p²-pq+pq-q². (-pq and +pq will be cancelled)

=p²-q²

Answer 2

*Answer: p2-q2

Explanation:*

=(p+q)(p-q)

=p(p-q)+q(p-q)

=p2-pq+pq-q2 :.(qp=pq)

(positive +pq negative -pq cancel)

Ans. p2-q2