Rearrange Formula Past Exam Question

I'm really sorry for this because I know it's not the hardest of formulas, but I have a complete blank on how to do it. (Doh)

I need to make t the subject of the formula.

F= 8 / root(t^2-6)

^2 being squared.

Don't worry, it's not for any homework or assignment, I'm revising for my exam in 3 weeks time. I know it's silly that I can't do this at such a late stage, but can anyone help? (Worried)

I thought I had to times both sides by root(t^2-6) and divide both sides by F first, but I could easily be wrong. (Speechless)