You want an interval such that .
So you want
So
and
For the first inequality solve:
So by the quadratic formula. We want the "+" solution as the "-" solution is less than 0. So we want to solve the inequality.
For the second inequality solve:
So by the quadratic formula. We again want the "+" solution since the "-" solution is less than 0. So we want .
Putting the two together gives an interval for x:
-Dan