Section 7'2 Multiplication and Division of Rational Expressions pg' 412

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Section 7.2Multiplication and Division of
Rational Expressionspg. 412
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Multiplying/Dividing Fractions (Review)
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More Multiplying

• Canceling (You may need to factor to see the
  cancel)

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Heres a couple of hard ones

• Factor then cancel if possible

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Division

• Multiply by reciprocal

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Simplifying Fractions

• Divide the numerator and denominator by the same
  quantity (preferably a factor common to both)
• Cancel factors that are common to both numerator
  and denominator
• Examples

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Least Common Denominator

• contains all the prime factors of each
  denominator

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Least Common Denominators (cont.)

• Factor first

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Solving Equations

• Strategy eliminate the denominators by
  multiplying both sides by the least common
  denominator.

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Dont Forget to Check Your Solutions

• You need know if your possible solution actually
  works or if there even is a solution.

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Homework

• page 421
• Problems 1, 3, 5, 9, 17, 21 through 55 odd, 63, 65