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Eksempel: Kubikroden af et negativt tal

Lær hvordan du finder kubikroden af -512 ved at opdele det i primtalsfaktorer. Dernæst finde grupper på tre af den samme faktor, da det er en faktor i kubikroden. Det hjælper at huske at -1⋅-1⋅-1 er -1, så kubikroden af -1 er -1. Lavet af Sal Khan og Montereys Institut for teknologi og undervisning.

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