Question

Factorise:

125a³ – 27b³

Answer 1

Given expression: 125a³ – 27b³

⇒ 5a³ – 3b³

We know that,

a³ + b³ = (a + b) (a² – ab + b²)

Hence,

⇒ (5a – 3b) (25a² + 15ab + 9b²)