A particle of mass m is in a region where its total energy E is less than

Question:

A particle of mass m is in a region where its total energy E is less than its potential energy U. Show that the Schr?dinger equation has nonzero solutions of the form Ae?.?Such solutions describe the wave function in quantum tunneling, beyond the turning points in a quantum harmonic oscillator, or beyond the well edges in a finite potential well.