We have web-based homework assignments and this question is baffling me. I know how to solve that equation, but the method I would use doesn’t involve rewriting it in the form that they’re prompting; I’ve never seen that form before and don’t know what it is. He hasn’t taught us anything like that, and I can’t find anything like it in the textbook. Any ideas?

I do not want help whatsoever on actually solving the problem.