we have
\(j(x) =x^{2}-9\\k(x)=-x+7\)
we know that
\(j(x)+k(x)\) --------> results in a second degree polynomial
\(j(x)-k(x)\) --------> results in a second degree polynomial
\(j(x)*k(x)\) --------> results in a third degree polynomial
\(j(x)/k(x)\) --------> results in a first degree polynomial
so
\(j(x)*k(x)\)
\((x^{2}-9)*(-x+7)=-x^{3} +7x^{2} +9x-63\)
therefore
the answer is
the multiplication of j(x) and k(x)
