Question 906488
You should be able to handle what you want when you understand this:


<a href="http://www.algebra.com/my/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev">http://www.algebra.com/my/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev</a>


Factorize a {{{-1}}} before putting your equation into vertex (standard) form; note that the parabola will have vertex as a maximum value.


x=0 gives the y-intercept.


y=0 gives the x-intercepts  (if they are REAL).


You will need to say what DNE stands for.