1. Day 8 GCF Day 2.notebook January 04, 2013
AIM: Factoring Expressions
Do Now
1.) Find the constant of proportionality:
x 5 6 7 8
y 15 18 21 24
2.) The temperature on January 2nd, in Syracuse NY
ranged from -120F for the low and 340F for the high,
what was the difference between the two temperatures?
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3. Day 8 GCF Day 2.notebook January 04, 2013
Correcting the Mistake
1.) A Student factors the following: 4x + 12 and
gets 4(x + 8).
Students Explanation: I found the GCF to be 4
and then I subtracted the GCF from each term
to determine the factor left inside the
parentheses.
Find, correct, and explain the mistake the
student made?
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4. Day 8 GCF Day 2.notebook January 04, 2013
1 Factor the following: 16x + 12
A 4(4x + 3)
B 4(12x + 8)
3(6x + 4)
C
D 2(14x + 10)
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5. Day 8 GCF Day 2.notebook January 04, 2013
2 Factor the following: 5y - 30
A 5(y - 25)
B 30(y - 1)
C 5(y - 6)
D 3(5y - 10)
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6. Day 8 GCF Day 2.notebook January 04, 2013
3 Factor the following: -18k - 33
A -6(3k + 27)
B -3(6k + 11)
C 3(6k + 11)
D -3(6k - 11)
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7. Day 8 GCF Day 2.notebook January 04, 2013
4 Factor the following: -12m + 36
A 4(3m + 9)
B 2(-6m - 18)
C 12(m - 3)
D 12(-m + 3)
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13. Day 8 GCF Day 2.notebook January 04, 2013
BEFORE YOU LEAVE
Graphing Connection
The goal of factoring is to find the roots of an
expression. We can graph on the graphing calculator to
show the roots.
3x - 6
y
10
9
8
7
6
5
4
3
2
1 x
10 8 6 4 2 0 2 4 6 8 10
2
3
4
5
6
7
8
9
10
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