Question 141387
{{{f(x) = x^3 +7x^2-x-7}}}

Factor by grouping:
{{{f(x) = x^2(x +7)-1(x+7) }}}
{{{f(x) = (x +7)(x^2-1) }}}
{{{f(x) = (x +7)(x-1)(x+1) }}}


Zeros are at x=-7,x=1, and x=-1, each of multiplicity 1.  D is correct!


R^2