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 04-29-2009, 11:32 PM #1 Member   Join Date: Aug 2008 Posts: 870 How to find vertice, line of symmetry of a parabola>? What are the formulas used to How to find vertice, line of symmetry of a parabola>? Reply
 04-30-2009, 12:29 AM #2 Super Moderator   Join Date: Jun 2005 Location: Northeast Posts: 1,967 1. If you are given two points on a parabola (or a circle for that matter) with the same y-coordinate, the average of those points x-coordinates is the vertex (or the circle's center, respectively) x-coordinate. 2. For y=ax^2+bx+c: vertex x=-b/(2a). 3. For y=a(x-k)^2+h: vertex is in (k, h). Reply

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