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Before a rational expression can be evaluated, which values must be identified?
AThose making it a whole
BThose making it a prime
CThose making it undefined
DThose making it negative
Answer & Solution
Correct answer: C. Those making it undefined
1. Some inputs are not allowed at all.
2. Division by 0 is undefined.
3. The task is to determine the values for which a rational expression is undefined.
4. Those are the values that make the denominator zero.
_Source: OpenStax Elementary Algebra 2e (CC BY 4.0), Ch 8 'Rational Expressions and Equations', sections 8.1-8.9_
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