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

2. I can factor trinomials using Swing and Divide Method
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. Don’t do one without doing the 2nd
Swing & Divide
2 Steps:
Swing and
Divide
Don’t do one without doing the 2nd

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

7. Always reduce fractions before finding final factors
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