\[x^{2} - 16x + n = 0;\ \ x_{1} = x_{2} - 2\ \]
\[\left\{ \begin{matrix} x_{1} + x_{2} = 16\ \ \ \ (1) \\ x_{1} \cdot x_{2} = n\ \ \ \ \ \ \ \ \ (2) \\ \end{matrix} \right.\ \]
\[(1)\ x_{2} - 2 + x_{2} = 16\]
\[2x_{2} = 18\]
\[x_{2} = 9.\]
\[(2)\ x_{1} = 9 - 2 = 7.\]
\[3)\ 7 \cdot 9 = n\]
\[n = 63.\]
\[Ответ:\ \ n = 63;\ \ x_{1} = 7;\ \ x_{2} = 9.\]