To determine the values that make a rational expression undefined, identify the denominator of the expression and solve for the values that make it equal to zero, as these values cannot be included in the domain of the expression. For instance, if the expression is \(\frac{a}{b}\), set \(b = 0\) and solve for \(b\).
In 1–2 sentences, discuss how to determine the values that make a rational expression undefined.
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