Question

Factorise:

a³ – 8b³ 

Answer 1

Given expression: a³ – 8b³ 

⇒ a³ – 2b³

We know that,

a³ + b³ = (a + b) (a² – ab + b²)

Hence,

⇒ (a – 2b) (a² + 2ab + 4b²)