10.4 Addition and Subtraction: Like Denominators - PowerPoint PPT Presentation

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10.4 Addition and Subtraction: Like Denominators

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10.4 Addition and Subtraction: Like Denominators Goal: to add and subtract rational expressions with like denominators To add and subtract rational expressions with ... – PowerPoint PPT presentation

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Title: 10.4 Addition and Subtraction: Like Denominators


1
10.4 Addition and Subtraction Like Denominators
  • Goal to add and subtract rational expressions
    with like denominators

2
To add and subtract rational expressions with
like denominators
  • Keep the denominator and add or subtract the
    numerators (just like adding like terms)
  • Remember to simplify your final answer

3
What does it mean to be simplified?
  • Your answer has to be completely factored (the
    numerator and denominator) any common factors
    must be canceled out

4
Add Subtract Rational Expressions
When the denominators are the same, add or
subtract the numerators and write the sum or
difference over the common denominator.
5
Add Subtract Rational Expressions
3m
6
Add Subtract Rational Expressions
7
Add Subtract Rational Expressions
3x2
4x
-15
- 45 4



8
Add Subtract Rational Expressions
9
Add Subtract Rational Expressions
10
Add Subtract Rational Expressions
Factors of AC SumB



x 4
11
Subtracting RE
  • When you subtract a RE remember to distribute the
    minus sign to the numerator of the 2nd RE

12
Subtract
13
Subtract Rational Expressions
14
Subtract fractions
( )
2
15
Subtract fractions
16
Subtract fractions
17
Subtract fractions
18
Subtract fractions
19
AssignmentPage 4432-32 even
Answer must be factored
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