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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

Complete set of real values of 'a' for which the equation x^4 - 2ax^2 + x + a^2 - a = 0 has all its roots real :

Options

  1. A[3/4, )
  2. B[1, )
  3. C[2, )
  4. D[0, ) .

Correct answer

A. [3/4, )

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