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Multiple choice

If roots of the equation$ { px }^{ 2 }+2qx+r=0$ and$ { qx }^{ 2 }-2\quad \sqrt { pr } x+q=0$ are simultanously real , the

  1. p = q,$ r\neq 0$
  2. 2q =$\pm \quad \sqrt { pr } $
  3. $\cfrac { p }{ q } =\cfrac { q }{ r }$
  4. $q=r\neq 0$
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B Correct answer

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