Factorize the following expression : \(8x^3y^3 + 27a^3\)
\[
8x^3y^3 + 27a^3
\]
\[
= (2xy)^3 + (3a)^3
\]
\[
= (2xy + 3a)\left[(2xy)^2 – (2xy)(3a) + (3a)^2\right]
\]
\[
= (2xy + 3a)(4x^2y^2 – 6axy + 9a^2)
\]