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## Homework Statement

In the figure, two point charges q1 = 3.40×10-5

*C*and q2 = 1.70×10-4

*C*are separated by a distance d = 0.10

*m*. Compute their net electric field E (x) as a function of x for the following positive and negative values of x, taking E to be positive when the vector E points to the right and negative when E points to the left. Plot your values in your notebook.

What is E(-0.100)?

## Homework Equations

E(X)=k[(q1/x^2)-(q2/(d+x)^2)]

## The Attempt at a Solution

I used the above equation, but the answer was wrong. When E(-0.100), does that mean the x in the equation is also negative? I get the feeling I've messed up some of the signs.