Question 1004435
Learn again how by studying 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>


Put into standard form and you can find roots (or zeros), the vertex, and if you let x=0 you find the y-axis intercept, helpful for graphing as well.  The {{{-1}}} coefficient on leading term means the parabola has a maximum and the parabola opens downward.



Graph showing vertex and zeros,   {{{graph(300,300,-6,10,-6,10,-x^2+10x-17)}}}