Minimum Work Needed to Bring 2 charges from distance infinity

[KMc19]

Two charged particles are brought together from a great distance (r=infinity) to a distance of 2 m. The particle has a positive charge of 3.0 x 10^-5 C and the second has a negative charge of 1.35 x 10^-5 C. What minimum work was accomplished in this process?

I can't for the life me figure out how I should set up the equation and solve!
Please help, it's driving me crazy!

 

[berkeman]

Two charged particles are brought together from a great distance (r=infinity) to a distance of 2 m. The particle has a positive charge of 3.0 x 10^-5 C and the second has a negative charge of 1.35 x 10^-5 C. What minimum work was accomplished in this process?

I can't for the life me figure out how I should set up the equation and solve!
Please help, it's driving me crazy!

What are the Relevant Equations? (that was asked on the Homework Help Template that you deleted when you posted your question...)

What is the equation for the force between two charged particles? What are some equations relating force and work?

 

[AlexChandler]

You should consider the change in potential energy of the system. (And also use the template) I think after filling out the equations part of the template you would have answered the question for yourself.