| |
| |
1. |
Use the quadratic formula to solve x2 + 2x - 8 = 0. |
| |
|
A. |
-4 |
B. |
-4, -2 |
| |
|
C. |
-2 |
D. |
-4, 2 |
| |
|
Hint |
|
| |
2. |
Use the quadratic formula to solve 6x2 - x - 1 = 0. |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
3. |
Use the quadratic formula to solve 2x2 + 7x + 4 = 0. Approximate the solutions to the nearest hundredth. |
| |
|
A. |
1.28, 3.66 |
B. |
-2.78, -0.72 |
| |
|
C. |
-5.56, -1.44 |
D. |
-3.35, -0.15 |
| |
|
Hint |
|
| |
4. |
Prospect High School decided to add a new parking lot for its increased student population. They just bought 15,000 ft2 of land next to the school. The only requirement of the new parking lot is that the length should be 100 feet more than the width. What is the quadratic equation representing the school's requirements? |
| |
|
A. |
x2 – 100x + 15,000 = 0 |
| |
|
B. |
x2 + 100x + 15,000 = 0 |
| |
|
C. |
x2 – 100x – 15,000 = 0 |
| |
|
D. |
x2 + 100x – 15,000 = 0 |
| |
|
Hint |
|
| |
5. |
In the quadratic formula, what does b2 – 4ac tell you. |
| |
|
A. |
the places where a quadratic equation crosses the x-axis |
B. |
the number of solutions in a quadratic equation |
| |
|
C. |
the solution(s) in a quadratic equation |
D. |
the vertex of a quadratic equation |
| |
|
Hint |
|
|
|