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Question
Factorise.
15pq + 15 + 9q + 25p
Sum
Solution
The given expression is 15pq + 15 + 9q + 25p
= 15pq + 9q + 25p + 15
= 3 × 5 × p × q + 3 × 3 × q + 5 × 5 × p + 3 × 5
= 3q (5p + 3) + 5 (5p + 3)
= (5p + 3) (3q + 5)
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