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Question
Subtract:
7p(3q + 7p) from 8p(2p – 7q)
Solution
We have,
7p(3q + 7p) and 8p(2p – 7q)
The required difference is given by 8p(2p – 7q) – 7p(3q + 7p)
= 16p2 – 56pq – 21pq – 49p2
= (16p2 – 49p2) + (–56pq – 21pq) ...[Grouping like terms]
= – 33p2 + (–77pq)
= – 33p2 – 77pq
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