Remember using FOIL to multiply binomials when you studied quadratics? It's back, this time with radicals. Combine what you know about multiplying radical expressions with FOIL and you can handle these products!
Adding radicals isn't too difficult. As long as they have like radicands, you can just treat them as if they were variables and combine like ones together! This tutorial takes you through the steps of adding radicals with like radicands. Take a look!