Question

Factorise: a³ -2√2 b³​

Answer 1

Answer:

use identity a³ - b³ = (a -b)(a² +ab +b²)

Step-by-step explanation:

a^3-2√2b^3=(a-2√2b)

(a^2+2√2ab+4*2*b^2

(a-b)(a^2+2√2ab+8b^2)

as (2√2b)^2=2*2√2*√2*b*b