- #1

Kaushik

- 282

- 17

**Summary:**Find the equation of the parabola when the focus and the equation of tangent at the vertex is known.

Find the equation of the parabola when the focus is ##(0,0)## and the equation of tangent at the vertex is ##x - y + 1 = 0##.

General equation : ## ax^2 + by^2 + 2hxy + 2gx + 2fy + c = 0##

Apart from this I have another question. It is given in my textbook that ##h^2 - ab = 0## for the general equation to represent parabola. Why or from where is this derived?