Question

plz tell me this question

Answer 1

where is the question friend that we have to expand??.

Answer 2

so we got the ans${(a - b)}^{3} = {(a)}^{3} - {(b)}^{3} - 3ab(a - b)$
${(a)}^{3} - {(b)}^{3} + 3 {a}^{2} b - 3a {b}^{2}$