1. The problem statement, all variables and given/known data 2t^3-4t-5=0 Find t 2. Relevant equations [-b-sqrt(b^2-4ac)]/2a 3. The attempt at a solution The answer is sqrt(2/3). No idea how this came about. I tried plugging in the equation and got it wrong. :( Please help I've been struggling over this for 5 hours.