2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33486We investigate homogeneous and isotropic cosmological models in scalar-tensor theories of gravity where two scalar fields are nonminimally coupled to the geometry. Exact solutions are found, by Noether symmetries, depending on the form of couplings and self-interaction potentials. An interesting feature is that we deal with the Brans-Dicke field and the inflaton on the same ground since both are nonminimally coupled and not distinguished {\it a priori} as in earlier models. This fact allows to improve dynamics to get successful extended inflationary scenarios. Double inflationary solutions are also discussed.LaTex file, 18 pages, no figures, 2 tables, to appear in Grav. & CosmGeneral Relativity and Quantum Cosmologytext