Length of the focal chord of the parabola y^2 = 4ax at a distance p from the vertex is??I NEED THE PROCEDURE OF SOLVING

First consider the points on the parabola where the chord intersects in the parametric form as (at₁^2 , 2at₁) and (at₂^2 , 2at₂). As it is a focal chord, t₁* t₂ = -1. Let this be our first equation. Now consider the equation of chord as we know two points. Now using the formula for the distance of a point from a line ( In this case the point is the origin and the line is the chord)we can get a relation between t₁ , t₂ , and p. Let this be our second equation. Using these both equations we can get the points which we assumed before in terms of p and then use the distance formula to find the length of the chord. This is how u solve this problem.

Its better to revise your basics on parabolas and even the previous topics as much as possible and know how to use them so that co- ordinate geometry wouldn''t be a big problem.

Approved