Everything that we learned in the school maths I've come to use at one time or another. Except one thing. Solving equations like this:
$$ 1 + \log_2^2 x = \log_2 8x $$
"Where do we use this in real life?" Is this an example of an actually useless piece of school maths or have I not come across the real life use yet?
I am not sure why, but raising a logarithm to a power (other than 1 or 0) seems inherently unphysical to me.