Add and Subtract Rational Expressions

Front

What is a rational expression?

Back

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

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

Back

Identify a common denominator for the rational expressions.

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Front

To add or subtract rational expressions we must have a _____________.

Back

common denominator

Front

What is the formula for finding the least common multiple (LCM) of two polynomials?

Back

The LCM is found by taking the highest power of each factor present in the polynomials.

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What does it mean to simplify a rational expression?

Back

To simplify a rational expression means to reduce it to its lowest terms by factoring and canceling common factors.

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What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions.