9. Find the excess of 4p- 2pq +3q'2 over 2p 2 - pq+ 4q2 .
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4p-2pq+3q^2+2p^2-pq+4q^2
4p-2pq-pq+3q^2+4q^2+2p^2
4p-3pq+7q^2+2p^2
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