Question 134054
How do you find a zero of a polynomial? You are given the zeros, so you need to create a polynomial that has those zeros.

{{{f(x) = (x+1) (x-1) (x-1)}}}   first zero is -1, followed by two factor with a zero at 1

Now do the multiplication
{{{ f(x) = (x+1)(x^2-2x+1)}}}
{{{ f(x) = x(x^2-2x+1)+ 1(x^2-2x+1)}}}
{{{ f(x) = x^3-2x^2+x+ x^2-2x+1}}}
{{{ f(x) = x^3-x^2-x+1}}}