Question

add: p(p-q),q(q-r),r(r-p)​

Answer 1

Answer:

Answer

p(p−q),q(q−r),r(r−p)

⇒p(p−q)+q(q−r)+r(r−p)

⇒p 2 −pq+q 2 −qr+r 2 −rp

Thus the sum =p 2 +q 2 +r 2 −pq−qr−pr