Q. 64.6( 9 Votes )

B. p(q + 1) (q - 1)

C. q(p - 1) (q + 1)

D. (pq - 1) (q + 1)

Answer :

pq2 + q(p – 1) – 1 = pq2 + qp – q – 1


= pq(q + 1) – 1(q + 1)


= (pq – 1)(q + 1)

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