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1. The problem statement, all variables and given/known data

The electric potential in a region of space is V= (260 x^2 - 180 y^2) V, where x and y are in meters.

What is the strength of the electric field at (2.00 m, 3.00 m) ?

x = 2.00 m

y = 3.00 m

2. Relevant equations

E = -grad(V)

3. The attempt at a solution

E = -grad(V) = -(520(x) - 360(y)) = -(-40) = 40

I feel really stupid because it's not the right answer... What am I doing wrong? Thanks in advance!

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# Strength of an Electric Field

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