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What is the value of k if the equation x^2 + kx + 4 = 0 has equal roots? (2022)

Practice Questions

1 question
Q1
What is the value of k if the equation x^2 + kx + 4 = 0 has equal roots? (2022)
  1. 4
  2. 8
  3. 0
  4. -4

Questions & Step-by-step Solutions

1 item
Q
Q: What is the value of k if the equation x^2 + kx + 4 = 0 has equal roots? (2022)
Solution: For equal roots, the discriminant must be zero. Thus, k^2 - 4*1*4 = 0, which gives k^2 = 16, so k = ±4.
Steps: 0

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