1.
Simplify 2
x
2
+ 5
x
2
+ 7
x
.
A.
7
x
2
+ 7
x
B.
2
x
2
+ 12
x
C.
14
x
2
D.
14
x
Hint
2.
Simplify the polynomial 4
a
2
+
a
2
.
A.
4
a
2
B.
4
a
2
+
a
C.
5
a
2
D.
6
a
2
Hint
3.
Write a polynomial for the model.
A.
-4
x
2
+ 4
B.
-4
x
2
+ 6
x
+ 4
C.
-4
x
2
– 6
x
– 4
D.
4
x
2
+ 6
x
+ 4
Hint
4.
Simplify
x
2
+ 5
x
+ 2 + (-4
x
) + 3
x
+ (-5) + 3.
A.
x
2
+ 4
x
+ -3
B.
x
2
+ (-
x
)
C.
x
2
+ 4
x
+ 1
D.
x
2
+ 4
x
Hint
5.
Simplify
m
+ 6 + 5
n
- 4
m
- 2
n
.
A.
-3
m
+
n
+ 9
B.
-3
m
+ 3
n
+ 6
C.
-3
m
+ 9
n
+ 6
D.
-3
m
+ 3
n
Hint