I'm not sure where to start with this one. I can do differentiation fairly well, but this question has me stumped. I've come across a few locus questions before, but not sure about the general method and approach when dealing with one of these. Any hints?
Q: A point P(x,y) moves such that its distance from (1,2) is twice its distance from (-3,0). Find the cartesian equation of the locus of P, in its simplest form.
If anyone can help in any way, I appreciate it. Thanks