| Rational Expressions |
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A Rational Expression is an algebraic fraction which has polynomials in both the numerator and denominator. |
Below are three examples of rational expressions:
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Figure 1. |
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| Excluded Values |
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The denominator of a fraction may not be 0. Any value for a variable that causes the denominator to equal 0 is called an excluded value. |
For the first example, the excluded value is 2. For the second example, the excluded value is 2. And for the third example, there are two excluded values: 0, and 0.25.
Rational expressions can be simplified, as shown below:
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Figure 2. |
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