Weekly-Tests-
10th-Grade-Mathematics-Australia
Easy

Question

Find the values of k for each of the following quadratic equations, so that they have two equal roots. 2x2 + kx + 3 = 0

  1. plus-or-minus 3 √ 6
  2. plus-or-minus 2 √ 6
  3. plus-or-minus square root of 6
  4. plus-or-minus 6 √ 6

The correct answer is: plus-or-minus 2 √ 6

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