Factorise : a^3-27 b^3+2 a^2 b-6 a b^2 - Vidyadip

Question

Factorise : $a^3-27 b^3+2 a^2 b-6 a b^2$

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Answer

$(a-3 b)\left(a^2+5 a b+9 b^2\right)$

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