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AP EAMCET20227 Jul 2022Evening ShiftMathematicsParabolaActual

If the directrix of the parabola x^2+4 y-6 x+ =0 is y+1=0 , then which of the following is correct?

Options

  1. A=-17
  2. B=-19
  3. Cfocus is (3,-3)
  4. Dvertex is (3,-3)

Correct answer

C. focus is (3,-3)

Step-by-step solution

Parabola is (x-3)^2=-4 (y- ( -9 4 ) ) Equation of direction is y= -9 4 +1 As direction is y+1=0, -9 4 +1=-1 =1 Vertex is (3,-2) and focus is (3,-3) .

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