AAC #7 Rational Expressions and Equations

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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 add rational expressions with the same denominator?

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To add rational expressions with the same denominator, combine the numerators and keep the denominator the same.

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What is the formula for subtracting rational expressions?

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To subtract rational expressions, find a common denominator, subtract the numerators, and simplify.

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What is the first step in solving a rational equation?

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The first step is to identify any restrictions on the variable that would make the denominator zero.

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How do you divide rational expressions?

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To divide rational expressions, multiply by the reciprocal of the divisor.

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What does it mean for a rational expression to be undefined?

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A rational expression is undefined when its denominator equals zero.

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