Factorise : 8 a^3-1 27 b^3 - Vidyadip

Question

Factorise : $8 a^3-\frac{1}{27 b^3}$

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Answer

$\left(2 a-\frac{1}{3 b}\right)\left(4 a^2+\frac{2 a}{3 b}+\frac{1}{9 b^2}\right)$

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