Where does “tredjegradsekvation” come from?
tredjegradsekvation (Swedish) comes from Swedish tredje, from Old Swedish þriþi, from Old Norse þriði, from Proto-Germanic þridjô, from Proto-Indo-European tretyós, from Proto-Indo-European tr̥tyós, from Proto-Indo-European tréyes — three.
tredjegradsekvation (Swedish): a cubic equation
Ancestry of “tredjegradsekvation”, step by step