alleryStart learning →Adding or subtracting rational expressions with unlike denominators requires getting:
ACommon exponents
BCommon variables
CCommon denominators
DCommon numerators
Answer & Solution
Correct answer: C. Common denominators
1. Unlike denominators must be reconciled first.
2. Rational expressions add like ordinary fractions.
3. When we add or subtract rational expressions with unlike denominators, a step is needed.
4. We will need to get common denominators.
_Source: OpenStax Elementary Algebra 2e (CC BY 4.0), Ch 8 'Rational Expressions and Equations', sections 8.1-8.9_
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