\[f(x) = \left\{ \begin{matrix} x²;\ \ \ \ \ \ \ \ \ - 3 \leq x \leq 2 \\ - x + 2;\ \ \ 2 < x \leq 6 \\ \end{matrix} \right.\ \]
\[f( - 3) = ( - 3)^{2} = 9\]
\[f(2) = 2^{2} = 4\]
\[f(3) = - 3 + 2 = - 1\]
\[f(6) = - 6 + 2 = - 4\]