Question

Simplify: (a - b)³ - (a³ - b³) ​

Answer 1

Answer:

$- 2 {b}^{3} + 3a {b}^{2} - 3 {a}^{2} b$

Step-by-step explanation:

(a-b)^3 =

${a}^{3} - \: {b}^{3} \: + 3a {b}^{2} - 3 {a}^{2}b$

${a}^{3} - {b}^{3} = \: (a - b) \: ( {a}^{2} + ab + {b}^{2} )$