GED Practice

Questions:
Directions: Choose or write the answer to each question. For questions 1 through 4, use the discriminant to determine how many real solutions the equation has.

1. 3x2 + 8x + 6 = 0
2. z2 =  9
3. 9d2 + 16 = 24d
4. -2x2 = 25 - 10x
5. what values of a, b, and c should be substituted into the quadratic formula to solve 5x2 - 3x + 2 = 0?
• a = 5; b = -3; c = -2
• a = 5; b = 3; c = -2
• a = 5; b = -3; c = 2
• a = 5; b = -3; c = 2
• The quadratic equation has one  real solution.
• The quadratic equation has two real solutions.
• The quadratic equation has no real solution.
• There is an error in the calculations.
7. If 16 + r2 - 8r = 0, what is r?
• -4
• -2
• 2
• 4
8. If 2n2 - 98, what is n?
• -49 or 49
• -7 or 7
• 7
• 49
9. If 3x2 + 16x - 84 = 0, what is x (rounded)?
• -3.26
• -3.26, 8.59
• 3.26, -8.59
• no real solutions
10. If 34z2 + 19z = 15, what is z (rounded)?
• -0.44, 1.00
• 0.44, -1.00
• 1.00
• no real solutions

1. 0
2. 2
3. 1
4. 0
5. a = 5; b = -3; c = 2
6. The quadratic equation has no real solution.
7. 4
8. -7 or 7
9. 3.26, -8.59
10. 0.44, -1.00

Reference:

Complete Test Preparation for the GED Test 2014 by Steck-Vaughn