Question

Factorise
a^3 - 0.216

Answer 1

This can be written as (a)^3-(0.6)^3 and by identity of a^3 b^3 = (a-b)(a^2+ab+b^2) we get (a-0.6)(a^2+0.6a+0.36) tada factorized you just have to know the identities.