Algebra I
Chapter 8/9 Part II
Warm-Ups
Section 8-5 WU, Day 1
Find the discriminant of the equation and use it to
determine how many solutions the equation has.
(Remember the discriminant is found using
2
b - 4ac )
2
1) x +8x +12
2)
x -12x + 36
2
3) -2x 2 + x -8
Section 8-5 WU, Day 2
Factor out the greatest common factor
1) -4x 5 +8x 3 -16x 2
2) a 7b3c6 + a 4b3c5 - a3b2 c2
Section 8-5 WU, Day 3
Factor by grouping
1) np + 2n + 8p + 16
2) xy – 7x +7y – 49
Section 8-6 WU, Day 1
Solve using Zero Product Property
1) 3k(k + 10) = 0
2) Factor first!
20 p -15p = 0
2
Section 8-6 WU, Day 2
Factor into 2 binomials
1) x 2 -15x + 50
2) x 2 - 2x - 35
Section 8-7 WU, Day 1
Solve by factoring. Factor into 2 binomials, then
set each piece equal to zero and solve. Make
sure initial equation equals zero.
1) x 2 + x - 20 = 0
2) x 2 - 6x = 27
Section 8-7 WU, Day 2
Factor using the First/Last method.
1) 3x 2 +17x +10
2)
2x - 3x - 9
2
Section 9-2 WU
Factor completely. Factor out a GCF first, then
factor the remaining trinomial into 2 binomials.
1) 2x 2 + 20x + 32
2) 3x 2 -12x - 36
Section 9-3 WU, Day 1
Estimate the solutions to the quadratics using
the picture of their graphs.
1)
2)
Section 9-3 WU, Day 2
Graph the following quadratic (sketch a grid)
and describe the change from the parent
function.
g(x) = (x + 5) - 4
2