The Potential Energy of a Particle Moving Along the X

Multiple Choice

The potential energy of a particle moving along the x axis is given by U(x) = (8.0 J/m²) x² + (2.0 J/m⁴) x⁴.
If the total mechanical energy is 9.0 J, the limits of motion are:

A) -0.96 m; +0.96 m
B) -2.2 m; +2.2 m
C) -1.6 m; +1.6 m
D) -0.96 m; +2.2 m
E) -0.96 m; +1.6 m