Question 105114
{{{x^3-4x <= 0}}}   notice that {{{x}}} is common to both terms, and we can write:

{{{x(x^2 - 4) <= 0}}}  here we can factor {{{x^2 - 4}}} and write it as:

= > {{{x^2 - 2^2}}} 

= > {{{(x-2)(x+2)}}}

and we will have:

{{{x(x-2)(x+2) <= 0}}}