1.
Factor
x
2
– 8
x
+ 16.
A.
(
x
+ 4)(
x
– 4)
B.
(
x
- 4)
2
C.
(
x
+ 4)
2
D.
(
x
- 8)
2
Hint
2.
Factor
x
2
-
y
4
A.
(
x
+
y
)(
x
–
y
)
B.
(
x
-
y
2
)(
x
+
y
2
)
C.
(
x
-
y
2
)(
x
-
y
2
)
D.
(
x
+
y
2
)(
x
+
y
)(
x
–
y
)
Hint
3.
Factor 6
a
3
b
5
– 15
a
2
b
.
A.
3
a
3
b
(2
ab
2
- 5)
B.
ab
(6
a
2
b
4
- 15
a
)
C.
3(2
a
3
b
5
- 5
a
2
b
)
D.
3
a
2
b
(2
ab
4
- 5)
Hint
4.
Factor 81
x
2
– 225.
A.
9(3
x
– 5)(3
x
+ 5)
B.
9(9
x
– 25)(9
x
+ 25)
C.
9(9
x
– 5)(9
x
+ 5)
D.
It is prime.
Hint
5.
Solve the equation
x
2
–
x
+
= 0.
A.
B.
C.
D.
Hint
x + 
= 0.