Step 1: Group the first 2 terms together, separating them from the constant term.
Step 2: Factor out leading coefficient, for completing the square to work, the coefficient of x2 must be 1.
Step 3: Complete the square, Take half of x coefficient and square it. Notice to keep equation balanced you must add this number and subtract it making the net effect zero.
Step 4: Distribute and add constants.
Now it is successfully in vertex form
