\[y = \frac{12}{x}\]
| \[x\] | \[\pm 2\] | \[\pm 3\] | \[\pm 4\] |
|---|---|---|---|
| \[y\] | \[\pm 6\] | \[\pm 4\] | \[\pm 3\] |
\[y = - x^{2} - x + 6 \Longrightarrow ветви\ вниз\]
\[x_{0} = \frac{1}{- 2} = - \frac{1}{2};\ \ y_{0} = 6\frac{1}{4}\]
| \[x\] | \[0\] | \[1\] |
|---|---|---|
| \[y\] | \[6\] | \[4\] |

\[Ответ:1\ корень.\]