I have a couple of questions in this weeks work that I'm unsure how to approach. The first question is as follows -

"Use algebra to express in the form ." I have made a few attempts at trying to complete this question, but as yet have been unsuccessful.

Another question I'm having difficulty with is "Find all linear functions f(x) = ax + b such that f(x) = f^{-1}(x), where f(x) = (x - 3)^{2}(4 - x)(2x + 1)". I'm not entirely sure what this question is asking.

Any help would be greatly appreciated.

Thank you.