Operations on Rational Expressions

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What is a rational expression?

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

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How do you divide rational expressions?

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To divide rational expressions, multiply the first expression by the reciprocal of the second expression.

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What is the reciprocal of a fraction?

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What is the first step in adding rational expressions with the same denominator?

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Combine the numerators over the common denominator.

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What is the formula for multiplying two rational expressions?

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How do you simplify a rational expression?

Back

Factor the numerator and denominator and then cancel any common factors.

Front

What is the least common denominator (LCD)?

Back

The least common denominator is the smallest expression that can be used as a common denominator for two or more fractions.

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