1st off that is a fallacious argument. The word 'Trinity' doesn't appear either and we know its there. Secondly, the concept of the papacy is not anywhere in the New Testament either and you believe in that from extra-biblical teaching sources. Thirdly, the concept of sola scriptura is indeed there, you just refuse to see it because it contradicts the RCC.
It's all over the place just like the Trinity is...It took you church over 300 years to find the Trinity...Your church doesn't want to find Sola Scripture...
Your church tells you what to believe and you do it...
And that brings up an interesting problem...You guys claim that since the Mormons don't believe in the Trinity, they can't be Christians...So I guess that no one in your church, including your church fathers were Christians for the first 3 or 4 hundred years???