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I have a non-mathematician friend who is interested in re-learning algebra. I am more than happy to help, but I am in no position to judge what is a good introductory text --- only to identify when a text is a very bad one.

My friend is interested in starting from "basics" --- he's comfortable with order-of-operations, minus-times-minus-is-plus, and positive integer exponents. He's shaky with negative exponents, logarithms, and roots.

Any recommendations for good, freely-available resources?

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    Oops! I was thinking of *Algebra* By $S$aunders Mac Lane, Garrett Birkhoff. Don't know wh$y$ I confused that with Lang!2010-08-20

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Khan Academy offers dozens of videos on particular Algebra topics, among thousands of videos on other academic topics.

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Curriki is supposed to be a good resource for this kind of stuff, but I haven't tried it out myself.

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There's a pretty good video course on YouTube EDU, "College Algebra"