Adding and Subtracting Rational Expressions

Front

Define 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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What is the first step in adding or subtracting rational expressions with different denominators?

Back

Find the least common denominator (LCD) of the expressions.

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What is the next step after finding the LCD when adding rational expressions?

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Rewrite each expression with the LCD as the new denominator.

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Front

What is the formula for the sum of two rational expressions with the same denominator?

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