Vertex Form of the Equation
Key Questions

To convert a standard form quadratic into vertex form, the easiest method to use would be completing the square.
I have already answered a question, in depth, like this so please visit the following link! Hopefully it helps you out! :)
http://socratic.org/questions/howdoiconverttheequationfxx28x15tovertexform

#(h, k)# represent the parabola's vertex 
The vertex form of a quadratic function is
#y=(xh)^2+k# ,where
#(h,k)# is its vertex.