1.
Solve
x
2
–
x
– 72 = 0.
A.
x
= -8 or
x
= 9
B.
x
= -8
C.
x
= 8 or
x
= -9
D.
x
= 9
Hint
2.
Simplify -
a
(
a
3
- 3
a
2
+
a
).
A.
-
a
4
+ 3
a
3
B.
-
a
3
+ 3
a
2
-
a
C.
-
a
4
- 3
a
3
-
a
2
D.
-
a
4
+ 3
a
3
-
a
2
Hint
3.
Find the product (2
x
+ 3)(3
x
– 2).
A.
6
x
2
+ 5
x
– 5
B.
6
x
2
+ 9
x
– 6
C.
6
x
2
+ 5
x
– 6
D.
6
x
2
+ 9
x
– 5
Hint
4.
Find 5
x
(2
x
2
- 6
x
+ 12).
A.
10
x
3
- 30
x
2
- 60
x
B.
10
x
3
- 30
x
2
+ 60
x
C.
10
x
2
- 30
x
+ 60
D.
10
x
3
- 30
x
+ 60
Hint
5.
Solve (
x
– 8)(
x
+ 4).
A.
x
= 8 or
x
= -4
B.
x
= -8 or
x
= -6
C.
x
= -8 or
x
= 4
D.
x
= 8 or
x
= 4
Hint
6.
Simplify (7
w
2
)(
w
4
).
A.
7
w
8
B.
42
w
C.
7
w
4
D.
7
w
6
Hint
7.
Simplify (
a
3
b
)(
a
2
b
).
A.
a
6
b
2
B.
a
5
b
C.
a
6
b
D.
a
5
b
2
Hint
8.
Simplify 8
n
2
· 2
n
p
3
.
A.
16
n
p
3
B.
10
n
p
3
C.
10
n
3
p
3
D.
16
n
3
p
3
Hint
9.
Solve 5
x
(
x
– 2) = 0.
A.
x
= 0 or
x
= -2
B.
x
= 0
C.
x
= 2
D.
x
= 0 or
x
= 2
Hint
10.
Find the product 5
x
(3
x
– 1).
A.
-2
x
B.
15
x
2
- 5
x
C.
8
x
2
+ 4
x
D.
15
x
2
- 1
Hint