Parametrics (1 Viewer)

[Joshmosh2]

The straight line y = mx+b meets the parabola x = 2At, y= At^2 in real distinct points P,Q which correspond respectively to the values t = p, t = q
a. prove that pq = -b/a

I'm sure the solution is really simple, but I can't see it.

 

[FrankXie]

The straight line y = mx+b meets the parabola x = 2At, y= At^2 in real distinct points P,Q which correspond respectively to the values t = p, t = q
a. prove that pq = -b/a

I'm sure the solution is really simple, but I can't see it.