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$\begin{tabular}{|c|c|} \hline $x$ & $f(x)$ \\ \hline $-1$ & $10$ \\ \hline $0$ & $14$ \\ \hline $1$ & $20$ \\ \hline \end{tabular}$ For the quadratic function $f$, the table shows three values of $x$ and their corresponding values of $f(x)$. Which equation defines $f$?