1.
Find (4
x
2
+ 3
x
) + (7
x
2
– 5
x
– 6).
A.
11
x
2
– 8
x
– 6
B.
11
x
4
– 2
x
2
– 6
C.
9
x
– 6
D.
11
x
2
– 2
x
– 6
Hint
2.
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
–
x
2
+ 5
x
- 12
C.
–3
x
3
– 13
x
2
+ 5
x
+ 4
D.
-11
x
8
+ 4
Hint
3.
Find the sum (4
xy
2
– 3
x
2
y
– 5
xy
– 6) + (-5
xy
2
– 2
xy
+ 3).
A.
-
xy
2
– 3
x
2
y
– 7
xy
– 3
B.
-
xy
2
– 3
x
2
y
– 3
xy
– 3
C.
4
xy
2
– 8
x
2
y
– 7
xy
– 3
D.
4
xy
2
– 7
xy
– 3
Hint
4.
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.
-3
x
4
y
2
- 4
xy
2
+ 2
xy
2
- 10
D.
-11
x
4
y
2
- 3
x
2
y
+ 3
xy
2
Hint
5.
Suppose the perimeter of a triangle is given by
P
= 13
x
+ 5
y
, and two of its sides have lengths of 2
x
+
y
and 8
x
+ 4
y
. What is the length of the third side?
A.
6
x
+ 3
y
B.
3
x
+
y
C.
23
x
+ 5
y
D.
3
x
Hint