V=R(1/x squared-1/y squared)solve for y
v=r((1/x^2)-(1/y)^2)
v/r=x^-2 - y^-2
(v/r)-(x^-2)=-y^-2
(x^-2)-(v/r)=y^-2
y=((x^-2)-(v/r))^(-1/2)