Question

Pls help me factorise this question.
Factorise: 3-81x^3

Answer 1

Step-by-step explanation:

3( 1-27x^3)

3( 1^3 -(3x) ^3)

3 ( 1-3x) ( 1+9x^2+ 3x)

using identity ( a^3-b^3) = ( a-b) ( a^2+b^2+ab)