Adding and Subtracting Rational Expressions

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What is a rational expression?

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A rational expression is a fraction where the numerator and the denominator are both polynomials.

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How do you find a common denominator for rational expressions?

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To find a common denominator, identify the least common multiple (LCM) of the denominators of the rational expressions.

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What is the first step in adding rational expressions?

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The first step is to find a common denominator for the expressions being added.

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What does it mean to simplify a rational expression?

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Simplifying a rational expression means reducing it to its lowest terms by factoring and canceling common factors.

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What is the formula for subtracting rational expressions?

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To subtract rational expressions, find a common denominator, rewrite each expression with that denominator, and then subtract the numerators.

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