1.
Find (
x
- 4)
2
.
A.
x
2
- 8
x
+ 16
B.
x
2
+ 16
C.
x
2
- 16
D.
x
2
- 4
x
+ 16
Hint
2.
Find (4
r
+ 7
s
)(4
r
- 7
s
)
A.
16
r
2
- 56
rs
+ 49
s
2
B.
16
r
2
- 49
s
2
C.
16
r
2
+ 49
s
2
D.
16
r
2
+ 56
rs
+ 49
s
2
Hint
3.
Expand the expression.(9
z
+ 2)
2
A.
81
z
2
+ 4
B.
81
z
2
+ 18
z
+ 4
C.
81
z
2
+ 36
z
+ 4
D.
81
z
2
– 4
Hint
4.
Expand the expression.(2
s
+ 6)(2
s
– 6)
A.
4
s
2
– 24
s
– 36
B.
4
s
2
– 36
C.
4
s
2
+ 24
s
– 36
D.
4
s
2
+ 36
Hint
5.
Use the difference of two squares to find the product.
A.
(60 + 1)(60 – 1) = 3,600 – 1 = 3,599
B.
(60 + 1)(60 + 1) = 3,600 + 120 + 1 = 3,721
C.
–(60 + 1)(60 – 1) = –3,600 + 1 = –3,599
D.
–(60 + 1)(60 + 1) = –3,600 – 120 – 1 =– 3,721
Hint