\[f(x) = \left\{ \begin{matrix} x²;\ \ \ \ \ \ \ \ \ - 3 \leq x \leq 2 \\ - x + 2;\ \ \ 2 < x \leq 6 \\ \end{matrix} \right.\ \]
\[ООФ:\ \ \ D(f) = \lbrack - 3;6\rbrack.\]