Section 4-4 Factoring ax 2 + bx + c = 0 a is not 1

1. Section 4-4Factoring ax2 + bx + c = 0a is not 1 Swing & Divide

2. Objectives • I can factor trinomials using Swing and Divide Method

3. Factoring a Trinomial • When factoring an expression with 3 terms you will always get two factors • x2 + bx + c

4. Swing and Divide Method • The Swing & Divide method is very similar to Reverse FOIL, but with 2 extra steps: • You can use this method when the number in front of the x2 term is not 1 • EX: 2x2 – x - 3

5. Swing & Divide • 2 Steps: • Swing and • Divide • Don’t do one without doing the 2nd

6. Swing & Divide Method Swing Final Factors Now use FOIL Divide by Swing #

7. Reducing and Checking • Always reduce fractions before finding final factors • Use TWO Finger Check when done

8. Example 2 Swing Final Factors Now use FOIL Divide by Swing #

9. Example 3 Swing Reduce Final Factors Now use FOIL Divide by Swing #

10. Board 1

11. Board 2

12. Board 3

13. Homework • WS 5-4