\[- 0,5x^{4} = 4x\]
\[\left\{ \begin{matrix} y = - 0,5x^{4} \\ y = 4x\ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[4x + 0,5x^{4} = 0\]
\[x\left( 4 + 0,5x^{3} \right) = 0\]
\[x = 0\ \ \ \ \ \ \ \ \ \ \ 0,5x^{3} = - 4\]
\[\text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }x^{3} = - 8\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = - 2\]
\[y = - 0,5x^{4}\]
| \[x\] | \[0\] | \[1\] | \[- 1\] |
|---|---|---|---|
| \[y\] | \[0\] | \[- 0,5\] | \[0,5\] |
\[y = 4x\]
| \[x\] | \[1\] | \[0\] |
|---|---|---|
| \[y\] | \[4\] | \[0\] |

\[Ответ:\ \ \ (0;0);\ \ ( - 2;\ - 8).\]