1.
The factors of
x
2
- 8
x
- 20 = 0 are ____.
A.
(
x
- 2) and (
x
- 10)
B.
(
x
+ 2) and (
x
- 10)
C.
(
x
+ 2) and (
x
+ 10)
D.
(
x
- 2) and (
x
+ 10)
Hint
2.
The roots of the equation
x
2
- 8
x
- 20 = 0 are ____.
A.
2 and 10
B.
-2 and 10
C.
-2 and -10
D.
2 and -10
Hint
3.
If you solve 2
m
2
+ 8
m
+ 1 = 0 by completing the square, first divide each side of the equation by ____.
A.
B.
2
C.
8
D.
1
Hint
4.
Solve the equation 2
x
2
-
x
+ 4 = 0 by any method.
A.
i
B.
1
i
C.
i
D.
i
Hint
5.
Find the discriminant of
x
2
- 2
x
+ 20 = 0.
A.
72
B.
76
C.
-72
D.
-76
Hint