7.5 Multiplying and Dividing Radical Expressions

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7.5 Multiplying and Dividing Radical Expressions
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Multiplying a Monomial by a Monomial

• (Multiply coefficients by each other multiply
  whats under the radicals by each other)

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Multiplying a Polynomial by a Monomial
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Multiplying a Polynomial by a Polynomial
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Rationalizing Denominators

• Replacing the denominator with a rational number
  (getting the radical out of the denominator)
• Multiply the num. denom. by a that will give
  a perfect square (or perfect cube or perfect root
  that you are taking) under the radical in the
  denom.

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Examples
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• Conjugate binomials
• The conjugate of a b is a b and the
  conjugate of a b is a b.

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Rationalize the Denominator
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Example
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Rationalizing the Numerator