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Question
The sum of –7pq and 2pq is ______.
Options
–9pq
9pq
5pq
– 5pq
Solution
The sum of –7pq and 2pq is – 5pq.
Explanation:
Given, monomials are –7pq and 2pq.
∴ Their sum = –7pq + 2pq = (–7 + 2)pq ...[Both monomials consist of like terms, so adding their numerical coefficient]
= – 5pq
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