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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

Root(s) of the equation 9x^2 - 18|x| + 5 = 0 belonging to the domain of definition of the function f(x) = (x^2-x-2) is/are:

Options

  1. A-5 3 , -1 3
  2. B5 3 , 1 3
  3. C-5 3
  4. D-1 3 .

Correct answer

C. -5 3

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