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Question
Add: 3p2q2 - 4pq + 5, - 10p2q2, 15 + 9pq + 7p2q2
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Solution
(3p2q2 - 4pq + 5) + (-10 p2q2) + (15 + 9pq + 7p2q2)
= 3p2q2 - 4pq + 5 - 10 p2q2 + 15 + 9pq + 7p2q2
= 3p2q2 - 10 p2q2 + 7p2q2 - 4pq + 9pq + 5 + 15
= p2q2 (3 - 10 + 7) + pq (-4 + 9) + 5 + 15
= 5pq + 20
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