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## Homework Statement

A 13.0 nC charge is at x= 0 cm and a -1.2 nC charge is at 6 cm.

At what point or points on the x-axis is the electric potential zero?

## Homework Equations

V=kq/r

## The Attempt at a Solution

0=13K/r + 1.2K/(r-0.06)

13(r-0.06)=-1.2r

r=5.5 cm

There is another point where the electric potential is zero. I have tried r+0.06 and moving the (r-0.06) to the other side of the equation, but I haven't found a correct second point. How do I find the second point? Thanks!