A directory of useful objects found on the web for teaching Maths.
https://en.wikipedia.org/wiki/File:Completing_the_square.gif
https://en.wikipedia.org/wiki/User:LucasVB/Gallery (Alternate link)
Visualization
A visualisation of the completing the square method for solving quadratic equations.
5 July 2013 Edit: 19 June 2016
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