1.
Find the difference
(4 - 7
n
2
) - (-
n
+ 2
n
2
- 1).
A.
-9
n
2
+
n
+ 5
B.
-9
n
2
+
n
+ 3
C.
-5
n
2
-
n
+ 5
D.
-5
n
2
-
n
+ 3
Hint
2.
Find the difference.
A.
7
m
3
- 11
m
2
+ 5
m
+ 17
B.
7
m
3
- 11
m
2
- 5
m
- 1
C.
7
m
3
- 11
m
2
- 5
m
+ 17
D.
7
m
3
- 11
m
2
+ 5
m
+ 1
Hint
3.
Find the difference (14
x
2
+ 3
x
+ 11) – (10
x
2
+ 5).
A.
24
x
2
+ 3
x
+ 6
B.
4
x
2
+ 3
x
+ 16
C.
24
x
2
+ 3
x
+ 16
D.
4
x
2
+ 3
x
+ 6
Hint
4.
Find the difference (5
x
2
+ 2
y
2
) – (-
x
y
+ 2
y
2
).
A.
5
x
2
+
x
y
+ 4
y
2
B.
5
x
2
+
x
y
C.
5
x
2
-
x
y
D.
5
x
y
Hint
5.
A rectangle has length 10
x
+ 3 and width 6
x
+ 1. What is the difference between the length and the width of the rectangle?
A.
16
x
+ 4
B.
4
x
C.
4
x
+ 2
D.
4
x
+ 4
Hint