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## Homework Statement

Charge A and charge B are 3.00 m apart, and charge A is +2.00 C and charge B is +3.00 C. Charge C is located between them at a certain point and the force on charge C is zero. How far from charge A is charge C?

## Homework Equations

## The Attempt at a Solution

I am reviewing for my final and I can't remember how to do this!!! I wanted to use...

F = K*Q1*Q2 / r^2

But I can't have 0 in the denominator so I know I am missing something obvious...but I am not seeing it.