Your TI-89 graphing calculator can help you solve equations and systems of equations. All you have to do is put them in the proper format. Fortunately, the following list shows how to format equations so that the TI-89 graphing calculator can help solve them.
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Source:http://www.dummies.com/how-to/content/how-to-format-equations-on-the-ti89-graphing-calcu.html
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