Résoudre belong to the 3
rd group.
Résoudre is conjugated the same way that verbs that end in :
-udre
Résoudre is conjugated with
auxiliary avoir.
Résoudre verb is
direct transitive.
French verb résoudre can be conjugated in the reflexive form:
Se résoudre
Résoudre verb is a direct transitive verb, so passive voice can be used.