2.1 By applying Newton's second law to a body at a certain distance x at time t, the following second-order differential equation is obtained: · + 9x = 18 dt Use Laplace transforms to solve it, given...

Extracted text: 2.1 By applying Newton's second law to a body at a certain distance x at time t, the following second-order differential equation is obtained: · + 9x = 18 dt Use Laplace transforms to solve it, given the initial conditions x(0) = 0 dx and -(0) = 3 dt