1. Review Problems 1) 2) 3)

2. Add/Subtract Rational Expressions
Objective-to recall procedures used to add and subtract fractions, and apply to rational expressions

3. Review: Adding Fractions
You can only add like to like
Same Denominators

4. 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

5. Finding the LCD
Example:

6. Factor the Denominators

7. Assemble LCD

8. Build up Fractions to LCD×5 ×4

9. Add Numerators
And Reduce if Needed

10. Rational Expressions
Example:

11. Factor the Denominators

12. Assemble LCD
DENOMINATORS

13. Build up Fractions to LCD) ( x - ( ) 1 x + ( ) 1
FACTORED DENOMINATORS
LCD x = + - ( )( ) 1

14. Add Numerators

15. Simplify Numerator

16. Summary of Steps
Factor denominators
Assemble LCD
Build up Fractions
Add Numerators
Simplify Numerator

17. Try these examples 1) 2) 3)

18. Answers