1.
Simplify 2
x
2
+ 5
x
2
+ 7
x
.
A.
14
x
2
B.
14
x
C.
7
x
2
+ 7
x
D.
2
x
2
+ 12
x
Hint
2.
Add 3
x
2
+ 2
x
- 1 and
x
2
- 3
x
+ 5.
A.
2
x
2
+ 5
x
+ 4
B.
4
x
2
-
x
+ 4
C.
2
x
2
- 5
x
- 6
D.
4
x
2
+ 5
x
- 4
Hint
3.
Find the difference:
A.
-3
x
2
- 7
x
- 5
B.
-3
x
2
- 7
x
+ 1
C.
-3
x
2
+
x
- 5
D.
3
x
2
- 7
x
- 5
Hint
4.
Start with a square with side length. Create a large rectangle by adding two more squares of the same size, and remove a strip with a width of 1. What is the area of the new rectangle?
A.
x
(
x
+ 3) =
x
2
+ 3
x
B.
x
(
x
– 1) =
x
2
–
x
C.
x
(3
x
+ 1) = 3
x
2
+
x
D.
x
(3
x
– 1) = 3
x
2
–
x
Hint
5.
Use the distributive property to expand the expression.4
a
(2 + 7
a
)
A.
8 + 28
a
2
B.
8
a
+ 28
a
2
C.
8
a
+
a
2
D.
6
a
+ 28
a
2
Hint