lucyfox1289 lucyfox1289
  • 19-02-2024
  • Mathematics
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Solve the quadratic equation x² + 2x - 20 = 0 by completing the square.
a) x = 1 ± √21
b) x = -1 ± √21
c) x = 1 - √21
d) x = -21 ± √21

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