How Does Coulomb's Law Explain Force Between Three Charges?

[Deicider]

Homework Statement

q1=q3=5uC,q2=-2uC

q2 and q3 have d distance so q2 with q1
d=0.1m
q3 and q1 have √2d

Homework Equations

|q1||q2|
F=k----------
r^2

The Attempt at a Solution

:S

 

[AEM]

Homework Statement

q1=q3=5uC,q2=-2uC

q2 and q3 have d distance so q2 with q1
d=0.1m
q3 and q1 have √2d

Homework Equations

|q1||q2|
F=k----------
r^2

The Attempt at a Solution

:S

There doesn't seem to be a picture with your post and you haven't told us what the question actually is.