The Discriminant of a Quadratic: YOU DON"T NEED IT!
http://www.youtube.com/watch?v=4IVoIuMsK0A
In this video Dr James Tanton explains how one need not know “b^2-4ac” to answer those dreary algebra questions.
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This link, The Discriminant of a Quadratic: YOU DON"T NEED IT!: http://www.youtube.com/watch?v=4IVoIuMsK0A
Give to students: http://gomaths.net/2411
This link on MathsLinks: http://mths.co/l/2411
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