[tex]\bf \qquad \textit{parabola vertex form}\\\\
\begin{array}{llll}
y=a(x-{{ h}})^2+{{ k}}
\end{array} \qquad\qquad vertex\ ({{ h}},{{ k}})\\\\
-------------------------------\\\\
%y=-5(x-5)^2+1125
\begin{array}{llcll}
y=-5(x-&5)^2&+1125\\
&\uparrow &\uparrow \\
&h&k
\end{array}[/tex]
