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## Homework Statement

Is this question on electric potential solvable? I've tried everything. any ideas?

A charge of -1.9 × 10-9 C is at the origin and a charge of 9.4 × 10-9 C is on the x-axis at x = 3 m. At what two locations on the x-axis (xpositive, xnegative) is the potential zero?

## Homework Equations

## The Attempt at a Solution

heres what i did...

kq1/r1 = kq2/r2

first i canceled k because its on both sides, and a constant..

then i solved for r1...

r1 = r2q1/q2

then i added the values...

r1 = 3(-1.9e-9) / (9.4e-9)

answer = .606

this is wrong... please help! thanks