Final answer:
The potential is zero at the points where the potential energy function equals zero. To find these points, we can solve the equation U(x) = 0.
Step-by-step explanation:
The potential is zero at the points where the potential energy function equals zero. To determine the x-coordinate(s) of these points, we need to solve the equation U(x) = 0. We can find the zeros by graphing the potential energy function or by manipulating the equation algebraically.