4.3 Adding and Subtracting Rational Expressions

Front

Back

x ≠ 4

Front

What is an excluded value?

Back

A value that makes the denominator equal to 0.

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Back

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Back

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Back

Front

What is the definition of a rational expression?

Back

A fraction where the numerator and denominator are polynomials.

Front

How do you find the LCD of two rational expressions?

Back

Factor the denominators and take the highest power of each factor.

Front

What happens if you include an excluded value in the domain of a rational expression?

Back

The expression becomes undefined.

Front

What is the process for adding rational expressions?

Back

Find the LCD, rewrite each expression with the LCD, and then combine the numerators.

Front

What is the significance of simplifying rational expressions?

Back

It makes calculations easier and reveals any common factors.