\[y = \left\{ \begin{matrix} x + 2,\ \ если\ x \leq 2 \\ x²,\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ если\ x > 2 \\ \end{matrix} \right.\ .\]
\[f( - 4);\ \ f(2);\ \ f(5)\text{.\ }\]
\[f( - 4) = - 4 + 2 = - 2;\]
\[\text{f\ }(2) = 2 + 2 = 4;\]
\[f(5) = 5^{2} = 25.\]