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question is?
Potential at A and B?

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kq/r is V
for a:
9E9*(2.1E-9)/.05 + 9E9(-6.2E-9)/.05

do the same for point b
Work = delta E = q*delta V = q(V(B)-V(A))

V isn't a vector

yep thats correct i missed that

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