1. Lesson 8­4.notebook April 22, 2013
Assignment:
1­­>L8.4­8.5­8.6 Handout ­ Due Wednesday [4/24]
2­­>Chapter 8 Review Handout ­ Due Thursday [4/25] ­ completion
2­­>Chapter 8 Test ­ Thursday [4/25]

2. Lesson 8­4.notebook April 22, 2013
Lesson 8.5 WarmUp:
Factor each polynomial.
1) 5g2h3 + 40g3h2
2) 3x2 + 6x + x + 2
3) x2 ­ 4x ­ 21
4) x2 ­ 10x + 24
5) x2 + 4x ­ 21

3. Lesson 8­4.notebook April 22, 2013
Lesson 8.4:
*To factor trinomials that don't have a leading coefficient of "1"...
ax2 + bx + c...
find 2 integers, m and p, with a sum of b and a product of ac.
then write ax2 + mx + px + c, and factor by grouping.
ex­­>2x2 + 5x + 3
factors
sum of
factors

4. Lesson 8­4.notebook April 22, 2013
*prime polynomial ­ a polynomial that cannot be written as a product of 2
polynomials with integer coefficients
ex­­>4x2 ­ 3x + 5
****Always make sure and "factor" the trinomial first!
factors
sum of
factors

5. Lesson 8­4.notebook April 22, 2013
Lesson 8.4 examples:
Factor each polynomial. If it can't be factored using integers, write prime.
A) 7x2 + 29x + 4
B) 3x2 + 15x + 18
factors
sum of
factors
factors
sum of
factors

6. Lesson 8­4.notebook April 22, 2013
C) 3x2 ­ 17x + 20
D) 2x2 ­ x ­ 1
factors
sum of
factors
factors
sum of
factors

7. Lesson 8­4.notebook April 22, 2013
E) 4x2 ­ 3x + 5
Solve each equation. Check your solutions.
F) 2x2 + 9x ­ 18 = 0
factors
sum of
factors
factors
sum of
factors