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    edmar's Avatar
    edmar Posts: 1, Reputation: 1
    New Member

    Sep 6, 2007, 10:32 PM
    Rational Expressions
    This is a Rational Expression

    Add: 2/x+1 + 1/x-1
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member

    Sep 6, 2007, 11:40 PM

    You need to get the denominators the same, you can do this by multiplying either term by 1 (anything with the same numerator and denominator):

    Can you take it from here?
    s_cianci's Avatar
    s_cianci Posts: 5,472, Reputation: 760
    Uber Member

    Sep 8, 2007, 10:34 AM
    You need a common denominator. Determine the LCD for x + 1 and x - 1. Multiply each of the original numerators by the missing factor in the original denominator. Then combine the terms in the numerator.

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