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 LCDxxx  ()( )111 x  ()1 x  ()1)(x  ()1 x  ()1 FACTORED DENOMINATORS

14. Add Numerators

15. Simplify Numerator

16. Summary of Steps 1.Factor denominators 2.Assemble LCD 3.Build up Fractions 4.Add Numerators 5.Simplify Numerator

17. Try these examples 1) 2) 3)

18. Answers