SOLUTION: how do you find the information you need after using the formula -b/2*a ?

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Question 415365: how do you find the information you need after using the formula -b/2*a ?
Answer by praseenakos@yahoo.com(507) About Me  (Show Source):
You can put this solution on YOUR website!
with this formula, you can find
1. the axis of symmetry of a quadratic function.
2. Vertex of its graph
3. sum of the roots etc.