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Question
Factorise:
`216a^3 + b^3/343`
Sum
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Solution
Given expression: `216a^3 + b^3/343`
We know that,
a3 + b3 = (a + b) (a2 – ab + b2)
Hence,
`(6a + b/7)(36a^2 - (6ab)/7 + b^2/49)`
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