1. Unit 5 Factor Special Products
Section 2.8

2. Factor using GCF. 1) 3x3 + 6x2 + 9x 2) x3 + 5x

3. Special Products… Difference of Two Squares (D.O.T.S)
a2 – b2 = (a + b)(a – b)
Perfect Square Trinomial Pattern
a2 + 2ab + b2 = (a + b)2
a2 – 2ab + b2 = (a – b)2

4. Factor: DOTS (difference of two squares)
z2 – ) 2x2 – 18
7) y2 – ) 4r

5. MORE DOTS….
9) x2 – ) 49y2 – 25
11) c2 – 9d2 12) 45 – 80m2

6. Factor Perfect Square Trinomials
x2 – 10x ) y2 – 12y + 36
15) x2 + 14x ) t2 – 22t + 121

7. Solve DOTS and PS Solve by factoring.
17) x2 – 12x + 36 = ) 3z2 – 27 = 0
19) 6x2 + 24x = ) 4r2 = 100

8. Ticket Out the Door Factor. 1) x2 – 64 2) b2 – 81
3) x2 – 12x ) y2 + 22x + 121

9. Worksheet on DOTS and PERFECT SQUARE TRINOMIALS
Homework
Worksheet on DOTS and PERFECT SQUARE TRINOMIALS