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 both the numerator and the denominator are polynomials.

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How do you find the least common denominator (LCD) of rational expressions?

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To find the LCD, factor each denominator and take the highest power of each factor present in any denominator.

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What is the first step in adding or subtracting rational expressions?

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

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What is the process for simplifying a rational expression?

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Factor the numerator and denominator, cancel common factors, and simplify.

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What does it mean to combine rational expressions?

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Combining rational expressions involves adding or subtracting them, requiring a common denominator.

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