1.
Find the difference (-3
x
3
– 7
x
2
+ 5
x
– 4) – (6
x
2
– 8).
A.
–3
x
3
– 13
x
2
+ 5
x
- 12
B.
–3
x
3
– 13
x
2
+ 5
x
+ 4
C.
–3
x
3
–
x
2
+ 5
x
- 12
D.
-11
x
8
+ 4
Hint
2.
Find the sum (4
xy
2
– 3
x
2
y
– 5
xy
– 6) + (-5
xy
2
– 2
xy
+ 3).
A.
4
xy
2
– 7
xy
– 3
B.
-
xy
2
– 3
x
2
y
– 7
xy
– 3
C.
4
xy
2
– 8
x
2
y
– 7
xy
– 3
D.
-
xy
2
– 3
x
2
y
– 3
xy
– 3
Hint
3.
Find the difference (-7
x
4
y
2
– 3
x
2
y
+ 2
xy
2
– 5) – (4
x
4
y
2
–
xy
2
– 5).
A.
-11
x
4
y
2
- 3
x
2
y
+
xy
2
- 10
B.
-11
x
4
y
2
- 3
x
2
y
+ 3
xy
2
- 10
C.
-11
x
4
y
2
- 3
x
2
y
+ 3
xy
2
D.
-3
x
4
y
2
- 4
xy
2
+ 2
xy
2
- 10
Hint
4.
Find the polynomial that represents the measure of the perimeter of the triangle.
A.
15
xy
2
B.
5
xy
2
+ 10
x
C.
7
xy
2
+ 10
x
– 2
y
D.
7
x
3
y
6
+ 10
x
2
– 2
y
Hint
5.
Find (4
x
2
– 2
x
– 3) + (–
x
2
+ 7
x
– 4).
A.
3
x
2
+ 5
x
– 7
B.
3
x
2
+ 5
x
+ 1
C.
5
x
2
+ 5
x
– 7
D.
5
x
2
+ 5
x
+ 1
Hint