9pq^2+4pq from 5q2 + 4pq
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Step-by-step explanation:
4pq^2
9pq^2 + 4pq from 5pq^2 - 4pq
13pq^2 + q from 9pq^2-q
9pq^2 - q -13pq^2 - q
-4pq^2
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