dividerrebbero
Dividerrebbero is not a standard entry in Italian vocabulary. In most references it is considered a nonstandard or incorrect variant of the conditional mood of the verb dividere (to divide). The correct standard form is dividerebbero, which corresponds to the third-person plural conditional: they would divide.
Dividerrebbero may appear in informal writing, typographical mistakes, or as a mistaken orthography. It is not
Italian conditional forms for -ere verbs are typically built by attaching the appropriate endings to the verb
Dividere, Italian verb conjugation, Conditional mood in Italian.
If you encounter dividerrebbero in a text, it is advisable to treat it as a likely error