2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229388We show that the virial theorem provides a useful simple tool for approximating nonlinear problems. In particular we consider conservative nonlinear oscillators and a bifurcation problem. In the former case we obtain the same main result derived earlier from the expansion in Chebyshev polynomials.Mathematical Physicstext