Rational Expressions

Front

What is a rational expression?

Back

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

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What makes a rational expression undefined?

Back

A rational expression is undefined when its denominator equals zero.

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The restriction is x ≠ 3.

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What is the Zero-Product Property?

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The Zero-Product Property states that if the product of two factors is zero, then at least one of the factors must be zero.

Front

Solve for x: (x - 5)(x + 2) = 0.

Back

x = 5 or x = -2.

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x = 2 or x = -2.

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How do you add rational expressions with different denominators?

Back

Find a common denominator, rewrite each fraction, and then combine the numerators.

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x ≠ 1 and x ≠ -1.

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