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Question
Factorise.
125p3 + q3
Sum
Solution
125p3 + q3
(5p)3 + (q)3
we know that,
a3 + b3 = (a + b) (a2 − ab + b2)
(5p)3 + (q)3 = (5p + q) ((5p)2 − 5p × q + (q)2)
= (5p + q) (25p2 − 5pq + q2)
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