1.
Add (
x
2
+ 2
x
+ 5) + (3
x
2
- 3
x
+1).
A.
3
x
2
-
x
+ 6
B.
4
x
2
-
x
+ 6
C.
2
x
2
+
x
+ 6
D.
4
x
4
-
x
2
+ 6
Hint
2.
Find the sum (7
a
2
-4) + (-2
a
2
+
a
+ 1).
A.
9
a
2
+
a
- 5
B.
-9
a
2
+
a
- 5
C.
5
a
2
+
a
- 3
D.
-5
a
2
-
a
+ 5
Hint
3.
Determine the sum.
A.
12
x
2
- 9
x
+ 1
B.
12
x
2
- 9
x
- 1
C.
12
x
2
+ 9
x
- 1
D.
12
x
2
+ 9
x
+ 1
Hint
4.
What is (-4
x
3
+ 3
x
2
- 5) + (
x
2
- 5
x
+ 6)?
A.
-4
x
3
+ 4
x
2
- 5
x
+ 1
B.
-3
x
2
- 2
x
2
+ 1
C.
-4
x
3
+ 3
x
2
D.
4
x
2
+ 1
Hint
5.
Find the sum (6
x
3
- 10) + (2
x
3
+ 5
x
+ 7). Then evaluate if
x
= -2.
A.
4
x
3
+ 5
x
+ 3; -39
B.
8
x
3
+ 5
x
- 3; -77
C.
8
x
3
-5
x
- 3; -25
D.
8
x
3
-5
x
+7; -47
Hint