bonus assignment! : quadratic formula

http://www.mathwarehouse.com/quadratic/the-quadratic-formula.php



Examples of the quadratic formula to solve an equation

• Example 1
  Quadratic Equation: y = x² + 2x + 1
  • a = 1
  • b = 2
  • c = 1
  Using the quadratic formula to solve this equation just substitute a,b, and c into the general formula:
  
  Below is a picture representing the graph of

  y = x² + 2x + 1 and its solution

  
• this site shows exactly what the quadratic formula does for you. (like finding the x-axis, and how to graph it.)