Completing The Square
-How and Where each variable goes in the x equation
-Solve word equations Using the x equation
-Convert Vertex equations into standard form
http://www.purplemath.com/modules/quadform.htm. Go on the site and you will see how the equation looks like. To convert it into that equation just plug in the variables from a standard form equation.
Quadratic Formula Example
Completing the Square Example
Likewise as the 1st example completing the square involves the formula x= -b +- (square root) b^2 - 4(a)(c) divided by 2 (a).Once this is done the last part of the equation will be x = -b + (square root of the product) divided by product of a and 2. That and another one only positive instead of a negative. The reason you get two answers is because in a parabola there is a high chance of having two x intercepts. There can also be one x intercept or no x intercept(s).
To find word problems related to quadratic equations click the link above.