Sal Khan, Monterey Institute for Technology and Education
You are absolutely tired of not knowing how to deal with equations that have absolute values in them. Well, this tutorial might help. Source: Khan Academy (www.khanacademy.org), used under the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license. All Khan Academy content is available for free at www.khanacademy.org. Khan Academy does not endorse the World Public Library.
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