1.
Find the sum (7
a
2
-4) + (-2
a
2
+
a
+ 1).
A.
-9
a
2
+
a
- 5
B.
-5
a
2
-
a
+ 5
C.
9
a
2
+
a
- 5
D.
5
a
2
+
a
- 3
Hint
2.
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
3.
What is (-4
x
3
+ 3
x
2
- 5) + (
x
2
- 5
x
+ 6)?
A.
-4
x
3
+ 3
x
2
B.
-3
x
2
- 2
x
2
+ 1
C.
-4
x
3
+ 4
x
2
- 5
x
+ 1
D.
4
x
2
+ 1
Hint
4.
Find the sum (7
x
2
+ 13
x
y
+ 5
y
2
) + (3
x
2
- 2
y
2
).
A.
13
x
2
y
2
+ 13
x
y
B.
10
x
2
+ 13
x
y
+ 3
y
2
C.
10
x
4
+ 13
x
y
+ 3
y
4
D.
10
x
2
+ 13
x
y
+ 7
y
2
Hint
5.
Find a formula for the perimeter of the triangle.
A.
18
x
+ 4
B.
18
x
+ 8
C.
18
x
– 4
D.
18
x
3
- 4
Hint