| |
| |
1. |
The roots of x2 + 4x + 7 are________. |
| |
|
A. |
real and rational |
B. |
real and irrational |
| |
|
C. |
real and imaginary |
D. |
imaginary |
| |
|
Hint |
|
| |
2. |
Solve x2 + 7x + 8 = 0. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
3. |
Solve x2 - 6x + 25 = 0. |
| |
|
A. |
3 ± 4i |
B. |
 |
| |
|
C. |
6 ± 8i |
D. |
-3 ± 4i |
| |
|
Hint |
|
| |
4. |
Solve x2 + 14x + 49 = 0 by using the quadratic formula. |
| |
|
A. |
3, 8 |
B. |
6, 16 |
| |
|
C. |
7, –18 |
D. |
–3, –8 |
| |
|
Hint |
|
| |
5. |
Find the value for the discriminant for the following equation:  . Then describe the number and type of roots. |
| |
|
A. |
The discriminant is negative, so there are two complex roots. |
B. |
The discriminant is 100, which is not a perfect square; therefore, there are two irrational roots |
| |
|
C. |
The discriminant is 96, which is not a perfect square; therefore, there are two irrational roots. |
D. |
The discriminant is 100, which is a perfect square; therefore, there are two rational roots |
| |
|
Hint |
|
|
|