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NDA2016MathematicsQuadratic EquationActual

Given that and are the roots of the equation x^2+b x+c=0 with b 0 . What is ( + ) equal to?

Options

  1. Ab ( c -1)
  2. Bc(b-1)
  3. Cc(b-1)⁻¹
  4. Db(c-1)⁻¹

Correct answer

D. b(c-1)⁻¹

Step-by-step solution

x^2+b x+c=0 b 0 and are roots of equation. aligned & + = -b 1 =-b ...(1) & = c 1 =c & array c ( + )= + 1- = -b 1-c =b(c-1)⁻¹ array aligned

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