The point charge A carries charge
The point charge B carries charge
The distance between A and B is
The electric intensity cannot be zero in between A and B as they are oppositely charged. The neutral point will be situated near A, the point charge of less magnitude and away from B , the point charge of greater magnitude,
Given that the intensity of the electric field is zero at x meters from A and y meters from B.
Again magnitude Intensity at neutral point due to A
And magnitude Intensity at neutral point due toB
From  and