| |
| |
1. |
Which equation is in quadratic form? |
| |
|
A. |
 |
B. |
x4 - x2 + x - 1 = 0 |
| |
|
C. |
3x3 + 3x + 3 = 0 |
D. |
 |
| |
|
Hint |
|
| |
2. |
Solve x4 - 5x2 + 4 = 0. |
| |
|
A. |
-1, 1, -2i, 2i |
B. |
-1, 1 |
| |
|
C. |
1, 2 |
D. |
-1, 1, -2, 2 |
| |
|
Hint |
|
| |
3. |
Write the expression  in quadratic form. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
4. |
Solve  |
| |
|
A. |
Solutions are –1 and 3125. |
B. |
Solutions are –1, 1, and 3125. |
| |
|
C. |
Solutions are 1 and  . |
D. |
Solutions are 1 and 3125. |
| |
|
Hint |
|
| |
5. |
Write the expression  in quadratic form. |
| |
|
A. |
cannot be done, since  |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
|
|