1. R.4 Factoring Mon Sept 8 Do Now Factor the following expressions 1) 2)

2. HW Review: p.7 #11-27 69-77 11) [-3, 3]69) 11 13) [-4, -1)71) 6 15) (-infinity, -2]73) 5.4 17) (3.8, infinity)75) 21/8 19) (7, infinity)77) 7 21) (0, 5) 23) [-9, -4) 25) [x, x+h] 27) (p, infinity)

3. Factoring In Algebra 2, we learned many methods of factoring polynomials including: Factor by removing a common factor Factor by grouping Factor trinomials of the type ax^2 + bx + c Factor special products of polynomials

4. Terms with Common Factors Always look for common factors before trying any other method Ex: 1)2)

5. Factoring by grouping In some polynomials, pairs of terms can first be grouped and factored Ex:

6. Trinomials of the type x^2 + bx + c When trinomials have this form (mostly quadratics), they can be factored into two linear factors We look for factors of C that add up to B Ex:

7. Trinomials of the type ax^2 + bx + c 1) Multiply a x c 2) Find factors of AC that add up to B, and break up Bx into those 2 factors 3) Factor by grouping EX:

8. Special Factorizations Squared Binomials Difference of squares Sum of cubes Difference of cubes

9. Ex Factor 1) 2)

10. Closure Describe how to use one factoring method. What is the ‘trick’? HW: p.29 (all odds) #1-7, 9-15, 19-31, 35-41, 47 49, 63 65, 67 71