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Published byCassandra Hopkins Modified over 9 years ago
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Review Problems 1) 2) 3)
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Add/Subtract Rational Expressions Objective-to recall procedures used to add and subtract fractions, and apply to rational expressions
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Review: Adding Fractions You can only add like to like – Same Denominators
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Different Denominators Make them the same – find a common denominator The product of all denominators is always a common denominator – But not always the least common denominator
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Finding the LCD Example:
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Factor the Denominators
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Assemble LCD
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Build up Fractions to LCD ×5 ×4
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Add Numerators And Reduce if Needed
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Rational Expressions Example:
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Factor the Denominators
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Assemble LCD DENOMINATORS
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Build up Fractions to LCD LCDxxx ()( )111 x ()1 x ()1)(x ()1 x ()1 FACTORED DENOMINATORS
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Add Numerators
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Simplify Numerator
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Summary of Steps 1.Factor denominators 2.Assemble LCD 3.Build up Fractions 4.Add Numerators 5.Simplify Numerator
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Try these examples 1) 2) 3)
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Answers
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