Harvard University Admission Entrance Tricks | Radical Algebra Aptitude Test
There are several YouTube channels with people explaining how to solve various math problems. I enjoy working simple math problems, it's good exercise for my brain. Sometimes, if the problem looks like something I can solve, I will attempt it. Some look like they are way above my pay grade, I ignore those. This one looked like I ought to be able to handle it. My first instinct was to expand the expression and hope that a solution would magically appear. They do, sometimes. But the power of ten meant that the expansion was going to be huge, and I don't want to do that, it would take an awful lot of scribbling. Maybe this guy has a trick up his sleeve, so I watched it. I have got to say his method is pretty clever.
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