1. Lesson 8-2: Adding and Subtracting Rational Expressions Algebra II CP Mrs. Mongold

2. Adding and Subtracting Rational Expressions Finding Least Common Multiples and Least Common Denominators! – Use prime factorization – Example: Find the LCM of 6 and 4 6 = 2·3 4 = 2 2 LCM= 2 2 ·3 = 12

3. Find the LCM 1. a 2 – 6a + 9 and a 2 + a -12

4. Find the LCM 2. 18r 2 s 5, 24r 3 st 2, and 15s 3 t

5. Find the LCM 3. 12a 2 b 4, 27ac 3, and 18a 5 b 2 c

6. Find the LCM 4. 15a 2 bc 3, 16b 5 c 2, 20a 3 c 6

7. Find the LCM 5. p 3 + 5p 2 + 6p and p 2 + 6p + 9

8. Find the LCM 6. q 2 – 4q + 4 and q 3 – 3q 2 + 2q

9. Find the LCM 7. 2k 3 – 5k 2 – 12l and k 3 – 8k 2 +16k

10. Find the LCM 8. x 3 -x 2 – 2x and x 2 – 4x + 4

11. Find the LCM 9. 6m 3 n 5, 42mnp 2, 36m 3 n 4 p

12. Add and Subtract Rational Expressions Same as fractions… – To add two fractions we find the LCD, the same things is going to happen with rational expressions

13. Examples 10. Simplify

14. Examples 11. Simplify

15. Examples 12. Simplify

16. Examples 13. Simplify

17. Examples 14. Simplify

18. Examples 15. Simplify

19. Examples 16. Simplify

20. Examples 17. Simplify

21. Day # 2 Examples 18. Simplify

22. Examples 19. Simplify

23. Examples 20. Simplify

24. Examples 21. Simplify

25. Examples 22. Simplify

26. Examples 23. Simplify

27. Examples 24. Simplify