This is the best of all possible outcomes!
This means there is exactly one meaningful positive real root. Now, where is it?
Recalling that , the root will be greater than 1 if r is positive (good news), and the root will be between 0 and 1 if r is negative (that doesn’t happen any more, does it?). This affords an opportunity to stretch our mastery of synthetic division.
(But not in the Vekovius sense!)