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Question

Add the following:
2p2q2−3pq+4,5+7pq−3p2q2

A
-p3q2+pq+9
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B
-p2q2+pq+9
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C
-p3q2+4q+9
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D
-p2q2+4pq+9
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Solution

The correct option is D -p2q2+4pq+9
After writing the given expressions in separate rows .with like terms one below the other, we have
2p2q23pq+4
-3p2q2+7pq+5
------------------------------------
-p2q2+4pq+9

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