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For the quadratic equation 2x^2 - 4x + k = 0 to have equal roots, what must be the value of k? (2019)

Practice Questions

1 question
Q1
For the quadratic equation 2x^2 - 4x + k = 0 to have equal roots, what must be the value of k? (2019)
  1. 0
  2. 2
  3. 4
  4. 8

Questions & Step-by-step Solutions

1 item
Q
Q: For the quadratic equation 2x^2 - 4x + k = 0 to have equal roots, what must be the value of k? (2019)
Solution: For equal roots, the discriminant must be zero: (-4)^2 - 4*2*k = 0. Solving gives k = 4.
Steps: 0

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