Solving for electric charges? Physics Homework Help?

Solving for electric charges? Physics Homework Help?




So I've been breezing through my homework when I come along this problem:



The attractive electric force between the point charges q and ?2q has a magnitude of 2.2 N when the separation between the charges is 1.4 m



Now, how would I solve for q?



I have q and -2q, how do I equate that to q^2?



Thanks.



11th grade Physics Honors.





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