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Quadratic Inequalities

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Inequalities Learning Material
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Tutorial
Revision
Notes
Revision
Questions
10.2Quadratic Inequalities

Quadratic Inequalities Revision Questions

1. . Which of the following values is a root of the quadratic inequality

x2 + 5x + 4 ≥ 0
  1. -4
  2. -3
  3. -2
  4. -1

Correct Answer: D

2. . Which of the following values is NOT a root of the quadratic inequality

x2 - 2x - 3 ≥ 0
  1. 0
  2. -1
  3. -2
  4. -3

Correct Answer: A

3. . What of the following is equivalent to the quadratic inequality

5 - 3x2 > 4x
  1. -3x2 - 4x + 5 < 0
  2. 3x2 + 4x - 5 > 0
  3. 3x2 + 4x - 5 < 0
  4. 3x2 - 4x - 5 < 0

Correct Answer: C

4. . What is/are the solution set(s) of the quadratic inequality

x2 - 7x + 6 < 0
  1. (-∞, 1) and (6, +∞)
  2. (1, 6)
  3. [1, 6]
  4. (-∞, 1] and [6, +∞)

Correct Answer: B

5. . What is/are the solution set(s) of the quadratic inequality

-x2 - 4x + 3 ≥ 0
  1. (-3, -1)
  2. [-3, -1]
  3. (-∞, -3) and (-1, +∞)
  4. (-∞, -3] and [-1, +∞)

Correct Answer: B

6. . What is the smallest number that belongs to the solution set of the quadratic inequality

3x2 - 2x - 1 ≤ 0
  1. -3
  2. -1
  3. -1/3
  4. 1

Correct Answer: C

7. . What is the maximum solution value of the inequality

2x2 - 5x + 3 > 0
  1. 0
  2. 1
  3. 3/2
  4. +∞

Correct Answer: D

8. . What is the maximum integer solution of the quadratic inequality

2 - 5x ≥ 3x2
  1. -2
  2. -1
  3. 0
  4. 1

Correct Answer: C

9. . What is the minimum integer value of m so that the inequality

x2 + mx + 3 < 0

has more than one solution?

Hint! Consider the sign of the discriminant.

  1. 3
  2. 4
  3. 5
  4. 6

Correct Answer: B

10. . What is the minimum integer value of m so that the inequality

2x2 + 7x + m ≤ 0

has no solution?

  1. 7
  2. 6
  3. 5
  4. 4

Correct Answer: A

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  6. Continuing learning inequalities - read our next math tutorial: Graphing Inequalities

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