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Sort: does the quadratic have real or complex roots?

Exercise and reference answers

Items
  1. Item
    x² − 5x + 6 = 0
    Answer
    left
  2. Item
    x² − 4 = 0
    Answer
    left
  3. Item
    x² − 2x + 1 = 0
    Answer
    left
  4. Item
    x² + 1 = 0
    Answer
    right
  5. Item
    x² + x + 1 = 0
    Answer
    right
  6. Item
    x² − 2x + 5 = 0
    Answer
    right
Categories
Left
Real
Right
Complex
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