Question

A point P is at distance of √10 from the point (2,3).Find the coordinates of the point P if its y coordinate is twice its x coordinate.

Answer 1

Let x coordinate be a.
Y coordinate = 2a
P (a, 2a)
By putting distance formula
We get the answer a= 1/5 or a= - 3
So we can get 2a = 2/5 or 2a= - 6
So P (1/5,2/5)
Or P (-3,-6)

Answer 2

let x cordinate be a
    y cordinate be 2a
then,p(a,2a)
=a =-3
  2a = -6
so, p=(-3,-6)