Question

Factorise

1. (a + b)³ - a-b

2. 108a² - 3(b -c)²​

Answer 1

Answer:

1)

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

2)

$108 {a}^{2} - 3 {b}^{2} - 3 {c}^{2} + 6bc$