Question

Factorise:

343a³ – 216b³

Answer 1

Given expression: 343a³ – 216b³

⇒ 7a³ – 6b³

We know that,

a³ + b³ = (a + b) (a² – ab + b²)

Hence,

⇒ (7a – 6b) (49a² + 42ab + 36b²)