Find the focus and directrix of the parabola 9x 5y2 0 focu

Solution

9x + 5y² = 0

5y² = -9x

y² = -9/5x

y² = 4(-9/20)x

As the vertex is at (0,0), p = -9/20, so the focus is at (-9/20, 0) and the directrix is at x = 9/20