Math, asked by shreyasunil2008, 5 hours ago

Evaluate using suitable identities
(pq-qr)^2- 4pq^2r

Answers

Answered by cjsdnjvmmmmmmmmmmmm

2

Answer:

(pq-qr)2 + 4pq2r

= (pq)2-2(pq)(qr) + (qr)2 + 4pq2r

= p2q2-pq2r + q2r2 + 4pq2r

= p2q2 + 3pq2r + q2r2

Therefore , (pq-qr)2 + 4pq2r = p2q2 + 3pq2r + q2r2

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