1.
Find (
x
- 4)
2
.
A.
x
2
- 8
x
+ 16
B.
x
2
+ 16
C.
x
2
- 4
x
+ 16
D.
x
2
- 16
Hint
2.
Find (5
t
2
- 2
w
)
2
A.
25
t
4
+ 4
w
2
B.
25
t
4
– 10
t
2
w
+ 4
w
2
C.
25
t
4
– 4
w
2
D.
25
t
4
– 20
t
2
w
+ 4
w
2
Hint
3.
Find (4
r
+ 7
s
)(4
r
- 7
s
)
A.
16
r
2
- 49
s
2
B.
16
r
2
- 56
rs
+ 49
s
2
C.
16
r
2
+ 56
rs
+ 49
s
2
D.
16
r
2
+ 49
s
2
Hint
4.
The length of one side of a square is
x
+ 4. What is the area?
A.
x
2
+ 8
x
+ 16
B.
x
2
+ 8
x
+ 8
C.
2
x
+ 8
D.
x
2
+ 4
x
+ 16
Hint
5.
Which of the following is a difference of two squares?
A.
x
2
+ 6x + 9
B.
x
2
– 9
C.
x
2
– 8
x
– 16
D.
x
2
+ 36
Hint