1.
Factor 7
xy
2
- 28
x
3
A.
(7
xy
+
x
)(
y
– 28
x
2
)
B.
7
x
(
y
+ 2
x
)(
y
- 2
x
)
C.
7
x
2
y
2
(1 +
x
)
D.
prime
Hint
2.
Factor 16
b
4
– 36
b
2
.
A.
2
b
2
(4
b
– 3)(4
b
+ 3)
B.
2
b
2
(2
b
– 3)(2
b
+ 3)
C.
4
b
2
(2
b
– 3)(2
b
+ 3)
D.
4
b
2
(4
b
– 3)(4
b
+ 3)
Hint
3.
Factor 3
x
3
+ 3
x
2
– 12
x
– 12.
A.
3(
x
– 2)(
x
– 2)(
x
+ 1)
B.
(
x
– 2)(
x
– 2)(
x
+ 1)
C.
(
x
– 2)(
x
+ 2)(
x
+ 1)
D.
3(
x
– 2)(
x
+ 2)(
x
+ 1)
Hint
4.
Solve 27
x
3
= 147
x
.
A.
B.
C.
D.
Hint
5.
Suppose that we have a 3 ft. × 3 ft. piece of paper, and we cut out a square piece so that the area of the remaining piece is 5 feet. What is the length of a side of the square?
A.
4 ft.
B.
2 ft.
C.
D.
Hint