Question

Add : p(p-q)+q(q-r)+r(r-p)​

Answer 1

Step-by-step explanation:

= p2 - pq + q2 - qr + r2 - rp

= p2 + q2 + r2 - pq - qr - rp

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Answer 2

p(p-q) + q(q-r) + r(r-p)​

= (p×p - p×q) + (q×q - q×r) + (r×r - r×p)

= (p2 - pq) + (q2 - qr) + (r2 - rp)

= p2 - pq + q2 - qr + r2 - rp

= p2 + q2 + r2 - pq - qr - rp (ans)