+5478 Re: quadratic formula
Which is 
If you mean how to use it, it helps you find the zeros of a quadratic equation in the form $${{\mathtt{ax}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{bx}}{\mathtt{\,\small\textbf+\,}}{\mathtt{c}} = {\mathtt{0}}$$
This site can help you understand it:
http://www.purplemath.com/modules/quadform.htm
+5478 Re: quadratic formula
Which is
If you mean how to use it, it helps you find the zeros of a quadratic equation in the form $${{\mathtt{ax}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{bx}}{\mathtt{\,\small\textbf+\,}}{\mathtt{c}} = {\mathtt{0}}$$
This site can help you understand it:
http://www.purplemath.com/modules/quadform.htm
+118677 Thanks Kitty,
A great answer - as always.
This will help you remember the formula
https://www.youtube.com/watch?v=O8ezDEk3qCg
It's worth a look!
