God IN THREE Persons.Not as two distinct Persons. Scriptures don't present Father and Son together as God in a single verse. The authors of NT do it distinctively. So we must not add them to make two Persons. That's what Trinitarians do by inference. Not a single scripture mentions F, S and Holy Spirit as distinct Persons together. This is what Trinitarians make by adding. They see Father as God in particular scriptures and likewise see The Son and The Holy Spirit as God in distinct scriptures and connect to say that they are distinct Persons which is erroneous. We don't have to add them up.
Standard Christian Theology.