If $ax^2 + 2hxy + by^2 + 2gx + 2fy + c = 0$,then $\frac{dy}{dx} = $

  • A
    $-\frac{ax + hy + g}{hx + by + f}$
  • B
    $\frac{ax + hy + g}{hx - by + f}$
  • C
    $\frac{ax - hy - g}{hx - by - f}$
  • D
    None of these

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