Complete the Entries in the Table Below to Make $f$ An Even Function

Essay

Complete the entries in the table below to make $f$ an even function
$$\begin{array} { | l | l | l | l | l | l | l | l | } \hline x & - 3 & - 2 & - 1 & 0 & 1 & 2 & 3 \\\hline f ( x ) & 5 & & - 2 & & & 3 & \\\hline\end{array}$$