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NDA2013MathematicsQuadratic EquationActual

The roots of the equation x^2-8 x+16=0

Options

  1. Aare imaginary
  2. Bare distinct and real
  3. Care equal and real
  4. Dcannot be ascertained

Correct answer

C. are equal and real

Step-by-step solution

aligned Discriminant ( D ) & =b^2-4 a . c & =(-8)^2-4.1 16 & =64-64=0 for D & =0, aligned two roots are real & equal.

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