Finding positions and charges from electric potential in the xy plane

[chagonio87]

can anybody help me with the following question:
the electric potential everwhere in xy plane is given by
V = 36/ ((x+1)^2 +y^2)^ 1/2 - 45/(x^2 +(y-2)^2)^ 1/2
where V is in volts and x,y in meters. Determine the position and charge on each of the particles that create this potential

 

[kuruman]

Hi chagonio87, welcome to PF. Please the template for homework help, list the relevant equations and tell us how you would approach the problem. Specifically about this problem, what do you know about discrete point charges and the potential they create in space?