Simplify Square Roots 00003

My first, absolutely failed attempt to green-screen was a lesson on how to simplify square roots. Here's Smartering 00003.

I've been asked why I'm going with a 5-digit numbering system; do I really intend to produce as many as 99,999 videos? The answer, of course, is that barring an accident involving a few rubber bands, a liquid lunch, and a particle accelerator (please Google Wowbagger the Infinitely Prolonged), I probably won't have the time to touch a tenth of a million. But I don't want to limit myself.