factorise pqr-pq-r+1
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Answer:
pqr-pq-r+1 (given)
pq(r-1) - 1(r-1)
(pq-1) (r-1) (Answer)
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=pq(r-1)-1(r-1)
=(pq-1)(r-1)
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hope it will help you
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