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Find the value of k for which the equation x² + 4x + k = 0 has no real roots. (2020)

Practice Questions

1 question
Q1
Find the value of k for which the equation x² + 4x + k = 0 has no real roots. (2020)
  1. -5
  2. -6
  3. -4
  4. -3

Questions & Step-by-step Solutions

1 item
Q
Q: Find the value of k for which the equation x² + 4x + k = 0 has no real roots. (2020)
Solution: The discriminant must be negative: 4² - 4*1*k < 0, which gives k > 4, so the minimum value is -6.
Steps: 0

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