how do I enter a quadratic equation to simplify

like this

x^2+5x-6=0

 

$${{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{6}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = -{\mathtt{6}}\\
{\mathtt{x}} = {\mathtt{1}}\\
\end{array} \right\}$$