\[\boxed{\text{334\ (334).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\left\{ \begin{matrix} xy = 5\ \ \ \ \\ y - x = 4 \\ \end{matrix} \right.\ \text{\ \ \ \ \ \ \ \ \ \ }\left\{ \begin{matrix} y = \frac{5}{x}\text{\ \ \ \ \ \ } \\ y = 4 + x \\ \end{matrix} \right.\ \]
\[y = \frac{5}{x}\]
\[x\] | \[1\] | \[5\] | \[2,5\] | \[- 1\] | \[- 5\] | \[- 2,5\] |
---|---|---|---|---|---|---|
\[y\] | \[5\] | \[1\] | \[2\] | \[- 5\] | \[- 1\] | \[- 2\] |
\[y = 4 + x\]
\[x\] | \[1\] | \[0\] |
---|---|---|
\[y\] | \[5\] | \[4\] |
\[Ответ:( - 5; - 1);(1;5).\]