\[\left\{ \begin{matrix}xy = 8\ \ \ \ \ \\y - x = 2 \\\end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix}y = \frac{8}{x}\text{\ \ \ \ \ \ \ \ } \\y = x + 2 \\\end{matrix} \right.\ \]
\[( - 4; - 2);\ \ (2;4).\]