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What is 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 does it mean to simplify a rational expression?

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Simplifying a rational expression means to reduce it to its simplest form by factoring and canceling common factors.

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What is the difference of two squares?

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Can you factor an expression with an addition sign using the difference of two squares?

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No, the difference of two squares can only be used for expressions with a subtraction sign.

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What values must be excluded from a rational expression to prevent division by zero?

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The values that make the denominator equal to zero must be excluded.

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