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NDA2012MathematicsQuadratic EquationActual

The equation formed by multiplying each root of a x^2+b x+c=0 by 2 is x^2+36 x+24=0 . Which one of the following is correct?

Options

  1. Ab c=a^2
  2. Bb c=36 a^2
  3. Cb c=72 a^2
  4. Db c=108 a^2

Correct answer

D. b c=108 a^2

Step-by-step solution

aligned & b=18 a & c=6 a aligned For the next Three (3) questions that follow: Let ( A + B )=1 and ( A - B )= 1 2 , where A , B [0, 2 ] .

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