Factorize : \( 125x^3 – 27y^3 – 255x^2y + 135xy^2 \)

\[ 125x^3 – 27y^3 – 255x^2y + 135xy^2 \] \[ = 125x^3 – 255x^2y + 135xy^2 – 27y^3 \] \[ = (5x)^3 – 3(5x)^2(3y) + 3(5x)(3y)^2 – (3y)^3 \] \[ = (5x – 3y)^3 \]