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NDA2016MathematicsQuadratic EquationActual

If x^2+p x+4 0 for all real values of x , then which one of the following is correct?

Options

  1. A| p | 4
  2. B| p | 4
  3. C| p | 4
  4. D| p | 4

Correct answer

B. | p | 4

Step-by-step solution

x^2-p x+4 0 real values of x aligned & If b^2-4 a c 0 & p^2-4(1)(4) 0 & p^2 16 |p| 4 aligned

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