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Question

The quotient when pq2+ 5pq+6p is divided by pq+2p is


A

q+3

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B

q-3

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C

q+2

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D

pq+3p

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Solution

The correct option is A

q+3


First factorize the given expression by using the method of common factors.

pq2+5pq+6p = p×q×q+5×p×q+6×p

= p(q2+5q+6)

Now factorize q2+5q+6 by using identities.

In q2+5q+6, 6 = 2×3 and 2+3 = 5

or q2+5q+6 = q2+2q+3q+6

= q(q+2)+3(q+2) = (q+2)(q+3)

So, pq2+5pq+6p = p(q+2)(q+3)

Therefore if we divide p(q+2)(q+3) by pq+2p we get (q+3) as quotient.


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