The electric field in a region of space is given by the

Question

The electric field in a region of space is given by the function E = Γx²x^{^} where Γ is a constant with value Γ = 120 N/C/m²

a) Compute the potential difference ?V_AB between the point A at x = 2 m and the point B at x = 4 m.

b) Explain how you selected the sign of the potential difference.