If \(x+5=0\) is the directrix and \((-3,0)\) the vertex of a parabola, then equation of this parabola is ____

• Correct answer
  A

  \(y^2=8(x+3)\)
• B

  \(y^2=8(x-3)\)
• C

  \(x^2=8(y+3)\)
• D

  \(x^2=8(y-3)\)

Solution

Given parabola is,
So, its equation is, \(y^2=4 a(x-(-3)\) Where \(a=2\) units. \(\therefore \quad y^2=8(x+3)\)

Hence, the correct answer is option: 'A'.