Bell Work
1. Factor out the GCF (greatest common factor)
5x3 + 20x2 – 25x
2. Factor by Grouping
xy – 2x + 5y – 10
3. FOIL (x + 4)(x – 1)
8.6 Notes
Recall:
FOIL
(x + 3)(x + 4)
(x + 2)(x + 3)
(x + 5)(x + 2)
The pattern:
x2 + bx + c = (x + m)(x + p)
where m + p = b and mp = c
Example: (b and c are positive)
1. x2 + 9x + 20
2. x2 + 11x + 24
3. x2 + 10t + 9
Example: (b is negative and c is positive)
1. x2 – 8x + 12
2. x2 – 22m + 21
3. x2 – 11x + 28
Example: (c is negative)
1. x2 + 2x – 15
2. x2 – 7x – 18
3. x2 – 2x – 24
Solving Equations
1. x2 + 6x – 27 = 0
2. x2 + 3x = 18
Homework
8.6 (pg. 507) #14-24 evens