Standard equation of parabola and position of pointMedium
Equation of Parabola from Directrix
If the equation of the parabola with vertex 
and the directrix x + 2y = 0 is αx2 + βy2 – γxy – 30x – 60y + 225 = 0, then α + β + γ is equal to :
and the directrix x + 2y = 0 is αx2 + βy2 – γxy – 30x – 60y + 225 = 0, then α + β + γ is equal to :SELECT ONE OPTION
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