Algebra 1 - 3rd Edition

Chapter 12: Rational Functions

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http://www.sparknotes.com/math/algebra2/rationalexpressions/
This site contains links to pages about ration expression terms and problems, as well as adding, subtracting, multiplying, and dividing ration expressions.

http://www.analyzemath.com/Rational_expressions/Rational_express.html
This page defines rational expressions and the domain and has examples about each.

http://www.purplemath.com/modules/rtnldefs2.htm
This page explains how to simplify rational expressions.

http://www.purplemath.com/modules/rtnlmult.htm
This page details how to multiply rational expressions and uses examples.

http://www.purplemath.com/modules/rtnlmult2.htm
This page details how to divide rational expressions and uses examples.

http://www.purplemath.com/modules/rtnladd.htm
This site examples how to add and subtract rational expressions through examples.

http://www.regentsprep.org/Regents/math/algtrig/ATO2/addfrac.htm
This page has notes on how to add and subtract rational expressions and has step-by-step solved examples.