
| \[x\] | \[- 3\] | \[3\] | \[- 1\] | \[1\] | \[9\] | \[- 9\] |
|---|---|---|---|---|---|---|
| \[y\] | \[- 3\] | \[3\] | \[- 9\] | \[9\] | \[1\] | \[- 1\] |

\[y = - 9 \Longrightarrow x = - 1\]
\[y = - 2,3 \Longrightarrow x = - 3\frac{21}{23}\]
\[y = 2,3 \Longrightarrow x = 3\frac{21}{23}\]
\[y = 9 \Longrightarrow x = 1\]