Thank you for your help Thomas coupling, Steve6443 and bingofuel. You have cleared that one up and I will continue with the studies.
To the other posters, though I understand the thoughts on the expected level of maths, I haven't been in a position to use it since leaving school and am doing what I can to refamiliarise myself before starting the first module, hence not just skipping though but taking the time to ask for support on forums like this.
The PPL level of studies at no point required rearranging formulas so it's an area I'm spending a long time in to become accustomed to again.