Question 681469
group like terms 
{{{(x^3 + 2*x^2) (-x-2) =0}}}
take out GCF
{{{x^2 (x+2)  -1 (x+2) = 0}}}
Distributive Property 
{{{(x^2 - 1) (x+2) = 0}}}
Difference of Squares
{{{(x-1) (x+1) (x+2) = 0}}}
Solve for x
{{{x-1=0}}}
{{{x=1}}}
{{{x+1=0}}}
{{{x=-1}}}
{{{x+2=0}}}
{{{x=-2}}}
Answers are 
X = -1,-2,1