nie jestem w 100% pewien
\frac{3+\sqrt{10}}{3-\sqrt{10}}*\frac{3+\sqrt{10}}{3+\sqrt{10}}+\frac{3-\sqrt{10}}{3+\sqrt{10}}*\frac{3-\sqrt{10}}{3-\sqrt{10}}=
\frac{9+3\sqrt{10}+3\sqrt{10}+10}{9-10}+\frac{9-3\sqrt{10}-3\sqrt{10}+10}{9-10}=
\frac{19+6\sqrt{10}}{-1}+\frac{19-6\sqrt{10}}{-1}=
\ -19-6\sqrt{10}-19+6\sqrt{10}=-38