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Multiple choice

The equation of the circle whose diameter is the common chord of the circles; $x^2+y^2+3x+2y+1=0$ & $x^2+y^2+3x+4y+2=0$ is?

  1. $x^2+y^2+8x+10y+2=0$
  2. $x^2+y^2-5x+4y+7=0$
  3. $2x^2+2y^2+6x+2y+1=0$
  4. None of these

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