Question

The coordinates of the points on the parabola y² = 8x whose focal distance is 4 are __________.

Answer 1

For y² = 8x defines a given parabola
∴ a = 2 [∵ y² = 4ax]

Here A and B are the points an parabola whose focal distance is 4.
i.e. A is determined by (2, 4) and B is determined by (2, −4)