\[- 7 - 3\sqrt{2}\ \ и\ - 7 + 3\sqrt{2}\]
\[x_{1} + x_{2} =\]
\[= - 7 - 3\sqrt{2} - 7 + 3\sqrt{2} = - 14;\]
\[x_{1} \cdot x_{2} =\]
\[= \left( - 7 - 3\sqrt{2} \right)\left( - 7 + 3\sqrt{2} \right) =\]
\[= 49 - 9 \cdot 2 = 49 - 18 = 31.\]
\[Уравнение:\]
\[x^{2} + 14x + 31 = 0.\]