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Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University
Factoring
Factoring ax2 + bx + c with a = 1
Warm-Ups
1
x
2
- 6x + 9 = (x - 3)
2
A)
TRUE
B)
FALSE
2
x
2
+ 6x + 9 = (x + 3)
2
A)
TRUE
B)
FALSE
3
x
2
+ 10x + 9 = (x - 9)(x - 1)
A)
TRUE
B)
FALSE
4
x
2
- 8x - 9 = (x - 8)(x - 9)
A)
TRUE
B)
FALSE
5
x
2
+ 8x - 9 = (x + 9)(x - 1)
A)
TRUE
B)
FALSE
6
x
2
+ 8x + 9 = (x + 3)
2
A)
TRUE
B)
FALSE
7
x
2
- 10xy + 9y
2
= (x - y)(x - 9y)
A)
TRUE
B)
FALSE
8
x
2
+ x + 1 = (x + 1)(x + 1)
A)
TRUE
B)
FALSE
9
x
2
+ xy + 20y2 = (x + 5y)(x - 4y)
A)
TRUE
B)
FALSE
10
x
2
+ 1 = (x + 1)(x + 1)
A)
TRUE
B)
FALSE
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