1.
Expand (
a
+ 2
b
)
4
.
A.
a
4
+ 8
a
3
b
+ 24
a
2
b
2
+ 4
ab
3
+
b
4
B.
a
4
+ 8
a
3
b
+ 24
a
2
b
2
+ 8
ab
3
+
b
4
C.
a
4
+ 4
a
3
b
+ 12
a
2
b
2
+ 8
ab
3
+
b
4
D.
a
4
+ 8
a
3
b
+ 24
a
2
b
2
+ 32
ab
3
+ 16
b
4
Hint
2.
Use Pascal's Triangle to expand (
a - x
)
3
.
A.
a
3
- 3
a
2
x
- 3
ax
2
-
x
3
B.
a
3
+ 3
a
2
x
+ 3
ax
2
+
x
3
C.
a
3
+ 3
a
2
x
- 3
ax
2
+
x
3
D.
a
3
- 3
a
2
x
+ 3
ax
2
-
x
3
Hint
3.
What is the seventh term of (
x - y
)
8
?
A.
-35
xy
7
B.
-28
xy
7
C.
8
xy
7
D.
-8
xy
7
Hint
4.
Simplify
.
A.
n
+ 1
B.
n
+ 1
C.
D.
n
Hint
5.
Find the expansion of
.
A.
a
4
+ 8
a
3
+ 16
a
2
+ 8
a
+ 2
B.
16
a
+
a
3
+ 6
a
2
+ 16
a
+ 16
C.
D.
Hint