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What is a rational expression?

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

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What does it mean to simplify a rational expression?

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To simplify a rational expression means to reduce it to its simplest form by canceling common factors in the numerator and denominator.

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The first step is to cancel the common factors in the numerator and denominator.

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How do you combine fractions with different denominators?

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To combine fractions with different denominators, find a common denominator, convert each fraction, and then add or subtract the numerators.

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What is the significance of canceling common factors in rational expressions?

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Canceling common factors simplifies the expression and makes calculations easier.

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