1. The problem statement, all variables and given/known data Solve for t: [-2(t2+1) / 9(t2-1)] < 0 3. The attempt at a solution I know that the answer is -inf<t<-1 and 1<t<inf, but how do I show the calculation to get that answer? When I tried, I narrowed it down to t<root-1, but that's not possible (without complex numbers) and doesn't match the answer???