Question

Factorise 8 x cube + root 27 y cube

Answer 1

$\sf {8x}^{3} + \sqrt{27} {y}^{3} \\ \bf {(2x)}^{3} + {( \sqrt{3} y)}^{3} \\ \sf \red{(2x + \sqrt{3} y)( {4x}^{2} + 3{y}^{2} - 2 \sqrt{3}xy)}$