Trinomials can be factored into two sets of binomials. Always, sometimes, or never?

Trinomials are polynomials that contain three (3) terms. A trinomial can sometimes be factored into two binomial and sometimes, it cannot be factored at all. In factoring, the each term in the trinomial equation affect the capability of it to be factored. Thus, trinomial are can be sometimes be factored into two sets of binomials.