1.
Add (
x
2
+ 2
x
+ 5) + (3
x
2
- 3
x
+1).
A.
2
x
2
+
x
+ 6
B.
4
x
2
-
x
+ 6
C.
3
x
2
-
x
+ 6
D.
4
x
4
-
x
2
+ 6
Hint
2.
What is (-4
x
3
+ 3
x
2
- 5) + (
x
2
- 5
x
+ 6)?
A.
-3
x
2
- 2
x
2
+ 1
B.
-4
x
3
+ 3
x
2
C.
-4
x
3
+ 4
x
2
- 5
x
+ 1
D.
4
x
2
+ 1
Hint
3.
Find the sum (6
x
3
- 10) + (2
x
3
+ 5
x
+ 7). Then evaluate if
x
= -2.
A.
8
x
3
+ 5
x
- 3; -77
B.
8
x
3
-5
x
+7; -47
C.
4
x
3
+ 5
x
+ 3; -39
D.
8
x
3
-5
x
- 3; -25
Hint
4.
Find the sum (7
x
2
+ 13
x
y
+ 5
y
2
) + (3
x
2
- 2
y
2
).
A.
10
x
2
+ 13
x
y
+ 3
y
2
B.
13
x
2
y
2
+ 13
x
y
C.
10
x
4
+ 13
x
y
+ 3
y
4
D.
10
x
2
+ 13
x
y
+ 7
y
2
Hint
5.
Find the sum (8
x
2
- 4
x
– 1) + (
x
2
- 5
x
+ 3).
A.
9
x
2
- 9
x
– 4
B.
9
x
2
-
x
+ 2
C.
9
x
4
- 9
x
2
+ 2
D.
9
x
2
- 9
x
+ 2
Hint