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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

Let , be real roots of the quadratic equation x^2 + kx + (k^2+2k-4) = 0 , then the minimum value of ^2 + ^2 is equal to :

Options

  1. A12
  2. B4/9
  3. C16/9
  4. D8/9 .

Correct answer

D. 8/9 .

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