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In the picture i attached, particles with charges q1 = +7e and q2 = -15e are fixed in place with a separation of d = 23.9 cm. With V = 0 at infinity, what are the finite (a) positive and (b) negative values of x (in cm) at which the net electric potential on the x axis is zero?

I dont understand why for positive net electric potential is in the middle between them, and negative is to the left. Can someone explain this.

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# Homework Help: Electric potential PRoblem , dont understand

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