2. x 5

3. 2xy

4. Fri 11/6 Lesson 4 – 4 Learning Objective: To factor difference and sum of cubes & by grouping Hw: Factoring WS 2

5. Algebra II

6.  To factor difference of cubes  To factor sum of cubes  To factor by grouping

9.  Pull out the cube roots  Square the first term  Change the Sign  First times the second term  Plus the last term squared

10. 2x 1 3x 2 + 2x + 1) + 6x + 4)

11. 4x 5 x 6y - 20x + 25) - 6xy

12. 1 x 1

13. Factor By Grouping  Mainly used when there are 4 terms  Group the first two terms & the last two terms  Factor from each group  “Combine” like terms

15. (x + 5) (3x + 2y) (7y – 6) = (7y – 6)(x + 1)(x – 1)

16. 10. 32ax + 12bx – 48ay – 18by = 2(16ax + 6bx – 24ay - 9by) = 2(2x(8a + 3b) – 3y(8a + 3b)) = 2 (2x – 3y) (8a + 3b)

17. 11. 30ac + 80bd + 40ad + 60bc = 10(3ac + 8bd + 4ad + 6bc) = 10(3ac + 4ad + 8bd + 6bc) = 10(a(3c + 4d) + 2b(4d + 3c)) = 10 (a + 2b) (3c + 4d)

18. (x – 3) (x – 8) = 2(x – 8)(x + 2)(x – 2)

19. x 1

20. 6x 4 3x 2