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

Objectives I can factor trinomials using Swing and Divide Method

Factoring a Trinomial When factoring an expression with 3 terms you will always get two factors x 2 + bx + c

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 x 2 term is not 1 EX: 2x 2 – x - 3

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

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

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

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

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

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Homework WS 5-4