1.
Find the product (2
z
- 5
x
)
2
.
A.
4
z
2
- 25
x
2
- 20
B.
4
z
2
- 25
x
2
C.
4
z
2
- 20
zx
+ 25
x
2
D.
4
z
2
+ 25
x
2
Hint
2.
Find the product (3
a
+
b
)
2
.
A.
6
a
2
- 6
ab
+
b
2
B.
9
a
2
-
b
2
C.
6
a
2
+ 3
ab
+
b
2
D.
9
a
2
+ 6
ab
+
b
2
Hint
3.
Find the product (6 + 3
b
)(6 – 3
b
).
A.
36 + 36
b
- 9
b
2
B.
36 + 36
b
+ 9
b
2
C.
36 + 9
b
2
D.
36 - 9
b
2
Hint
4.
Find the product of
x, x
– 2, and
x
+ 2.
A.
x
3
+ 4
x
2
+ 4
x
B.
x
3
+ 4
x
C.
x
3
- 4
x
D.
x
3
- 4
Hint
5.
Which equation represents the square of a difference?
A.
(
a
–
b
)
2
=
a
2
– 2
a
b
+
b
2
B.
(
a
+
b
)
2
=
a
2
+ 2
a
b
+
b
2
C.
(
a
+
b
)(
a
–
b
) =
a
2
+
b
2
D.
(
a
+
b
)(
a
–
b
) =
a
2
–
b
2
Hint