Multiplying and Dividing Rational Expressions

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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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CCSS.HSA.APR.D.7

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How do you multiply rational expressions?

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To multiply rational expressions, multiply the numerators together and the denominators together, then simplify if possible.

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CCSS.HSA.APR.D.7

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What is the first step in dividing rational expressions?

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The first step is to multiply by the reciprocal of the divisor.

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CCSS.HSA.APR.D.6

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What does it mean to simplify a rational expression?

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Simplifying a rational expression means reducing it to its lowest terms by canceling common factors in the numerator and denominator.

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CCSS.HSA.APR.D.6

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What is the formula for multiplying two binomials?

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The formula is (a + b)(c + d) = ac + ad + bc + bd.

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CCSS.HSA.APR.A.1

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CCSS.HSA.APR.C.4

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CCSS.HSA.APR.C.4

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CCSS.HSA.APR.D.7

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CCSS.HSA.APR.D.6

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What is a common mistake when dividing rational expressions?

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A common mistake is forgetting to multiply by the reciprocal of the divisor.

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CCSS.HSA.APR.D.6