HELP Need answer to this force due to charge problem

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To solve the problem of the net force on charge q due to two other charges, the electric force formula should be applied, considering the magnitudes of the charges and their distances. The charges are 3 micro Coulombs and 4.5 micro Coulombs, with a grid spacing of 0.24 m. It's essential to treat the forces as vector quantities, requiring vector addition to find the net force accurately. The discussion emphasizes the need for clarity in calculations and the importance of visualizing the charge arrangement. A detailed calculation using the provided values will yield the desired result.
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HELP! Need answer to this force due to charge problem!

Here it is:

Three charges are fixed in place as shown. The squares in the grid have sides of length s = 0.24 m. The magnitude of q is 3 mu or micro Coulombs (1 mu or micro Coulomb = 10-6 Coulombs), while the magnitude of Q is 4.5 mu or micro Coulombs. What is the magnitude of the net force on q due to the other two charges?

I really need the answer to the problem, it's killing me, I've worked on it for 2 hours and can't get it. The picture is attached.

Thanks a ton,
Matt

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How about writing the formula for electric force, and then putting in the numbers. Remember, the force and electric field are vector quantities, so one must use vector addition.
 

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