Question

please factorise the 13 question please fast factorise it

Answer 1

check I m right or not

Answer 2

${a}^{3} - 27 {b}^{3} + 2 {a}^{2} b - 6a {b}^{2} \\ {a}^{3} - (3b {)}^{3} + 2 {a}^{2} b - 6ab {}^{2}$