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Pls I need urgent help​

Answer» LHS,(5pq+2rs)²-(5pq-2rs)²/40We KNOW that a²-b²=(a+b)(a-b)TAKING a=5pq+2rs and b=5pq-2rs, we get⇒((5pq+2rs)+(5pq-2rs))((5pq+2rs)-(5pq-2rs))/40⇒(5pq+2rs+5pq-2rs)(5pq+2rs-5pq+2rs)/40⇒10pq*4rs/40⇒40pqrs/40⇒pqrs=RHSHence PROVED:)


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