Question 331825
{{{x^3+2x^2-x-2=0}}}
Group terms:
{{{(x^3+2x^2)-(x+2) = 0}}}
Factor:
{{{x^2(x+2)-(x+2) = 0}}}
{{{(x+2)(x^2-1) = 0}}}
{{{(x+2)(x-1)(x+1) = 0}}}
.
Roots are:
x ={-2, -1, 1}