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Reduce each rational expression to lowest terms. Assume that the
variables represent only numbers for which the denominators are


  • algebra -

    I assume you mean (a^2-b^2)/(a-b)

    a^2 - b^2 factors to (a-b)(a+b) by the difference of two squares.

    You now have (a-b)(a+b)/(a-b). The (a-b) cancel out, leaving you with (a+b)

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