1.
Find (
x
– 3)(
x
+ 3).
A.
x
2
- 6
x
+ 9
B.
x
2
+ 9
C.
x
2
- 6
x
- 9
D.
x
2
- 9
Hint
2.
Find (4
r
+ 7
s
)(4
r
- 7
s
)
A.
16
r
2
- 56
rs
+ 49
s
2
B.
16
r
2
+ 56
rs
+ 49
s
2
C.
16
r
2
+ 49
s
2
D.
16
r
2
- 49
s
2
Hint
3.
Find the product (3
x
+ 3)
2
.
A.
9
x
2
+ 12
x
+ 9
B.
6
x
2
+ 18
x
+ 9
C.
9
x
2
+ 18
x
+ 9
D.
6
x
2
+ 12
x
+ 9
Hint
4.
Which of the following is a difference of two squares?
A.
x
2
+ 36
B.
x
2
+ 6x + 9
C.
x
2
– 9
D.
x
2
– 8
x
– 16
Hint
5.
Find the product (4
n
+ 3)(4
n
– 3).
A.
16
n
2
+ 24
n
– 9
B.
16
n
2
+ 9
C.
16
n
2
– 9
D.
16
n
2
– 24
n
– 9
Hint