Question 452415
{{{x^2(x +4)<=4(x +4)}}} 

{{{x^2(x +4)/ (x +4) <=4}}}

{{{x^2 <=4}}}

{{{x}}}<=+-{{{sqrt(4)}}}

{{{x }}}<=+-{{{2}}}

Solutions:

{{{-2<=x<=2}}}