1. Factoring Unit – Day 4 Factoring ax 2 + bx + c Mrs. Parziale

2. Do Now Find the products. 1.(x + 2)(x + 6) = 2.(x – 9)(x + 9) = 3.(x – 3) 2 = 4.(2x – 5)(x + 5) =

3. Steps to Factoring Trinomials 4-Step Method Step 1: Multiply a and c Step 2: Find the factors of ac that add to get b Step 3: Rewrite the expression (breaking the middle term up) Step 4: Factor by grouping

4. Here’s a neat trick to help you find the factors of a number using your calculator. Example (#3) 11y 2 – 47y + 12 ac = 132 In the y= function, type in these two equations in y 1 and y 2. y 1 = 132/x y 2 = x+ 132/x Press 2 nd and Graph and scan the last column Y 2 for the value of -47. Look across to find the 2 factors that add to get -47. Calculator Trick

5. You Try These Factor completely

6. Closure Before any factoring, always look for what first? What are the four steps for factoring expressions in the form of ax 2 + bx + c? Explain how you would factor the following: 6x 2 + 18x – 12 6x 2 + 18x + 12