Elementary Algebra Skill
Solving Quadratic Equations by Factoring
Solve each equation by factoring.
1)
x
2
− 9
x
+ 18 = 0 2)
x
2
+ 5
x
+ 4 = 0
3)
n
2
− 64 = 0 4)
b
2
+ 5
b
= 0
5)
35
n
2
+ 22
n
+ 3 = 0 6)
15
b
2
+ 4
b
− 4 = 0
7)
7
p
2
− 38
p
− 24 = 0 8)
3
x
2
+ 14
x
− 49 = 0
9)
3
k
2
− 18
k
− 21 = 0 10)
6
k
2
− 42
k
+ 72 = 0
11)
x
2
=
11
x
− 28 12)
k
2
+ 15
k
= −56
13) 3
m
2
=
−16
m
− 21 14) 8
x
2
=
30 + 43
x
15)
x
2
+ 17
x
+ 49 = 3
x
16)
m
2
= 2
m
17)
2
k
2
− 14 = −3
k
18)
3
v
2
+ 36
v
+ 49 = 8
v
19)
10
x
2
− 26
x
= −12 20)
15
p
2
+ 80 = −80
p