Rational Expressions
     
     
     Rational Expressions
      Addition and subtraction of rational expressions
      Solving complex rational expressions
Addition and subtraction of rational expressions
To add or subtract two fractions with the same denominator, add or subtract the numerators and write the sum over the common denominator.
To add or subtract fractions with different denominators:
First find the least common denominator (lcd -the smallest number that can be divided by each denominator).
Write equivalent fractions using this denominator. Then add or subtract the fractions.
The process for rational expressions is identical.
Examples:  Perform the indicated operations and reduce the answer to lowest terms.
Solving complex rational expressions
A complex or compound rational expression has fractional expressions in its numerator, denominator or both.
To simplify complex fractions, change the complex fraction into a division problem, i.e., divide the numerator by the denominator.
Examples:  Simplify complex fractions.
Beginning Algebra Contents C
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