I have to re-arrange a formula for a current piece of coursework but i'm drawing a complete blank on what to do. I have reason to believe i know what the correct rearrangement is but i simply can't get there!
The formula is
s= r - √ (r² - y²)
and i have to rearrange to make y the subject.
I have found what is apparently the correct solution and it does appear to give the correct answer but i have no idea how to get there and i need to show each stage of working !
The formula which gives the right answer is
y = √(2r - s) * √(s)
Thank you to everyone who can help and look forward to becoming a part of your community, Matt