2) Find the value of: (4pq+39)2 – (4pq-39)2
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Answer:
(4pq+39)^2-(4pq-39)^2
={(4pq+39)+(4pq-39)}{(4pq+39)-(4pq-39)}
=(4pq+39+4pq-39)(4pq+39-4pq+39)
=8pq*78
=624pq
Step-by-step explanation:
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