Mastering Rational Expressions Flashcard

Front

Define a rational expression.

Back

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

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What is the first step in simplifying a rational expression?

Back

Factor both the numerator and the denominator completely.

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What is the method to solve a rational equation?

Back

Cross-multiply to eliminate the fractions, then solve the resulting equation.

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What is the least common denominator (LCD) in adding rational expressions?

Back

The least common denominator is the smallest expression that can be used to combine the fractions.

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What is the formula for subtracting two rational expressions?

Back

Find a common denominator, then subtract the numerators.

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