Comment résoudre l'équation (x^3 - 4x^2-5)/(2(x^2-1)^2)=0 ?

(x^3 - 4x^2-5)/(2(x^2-1)^2)=0 j'ai pas besoin de la solution mais juste d'aide pour la méthode à utiliser. Pour info, le signe ^ signifie "puissance"
merci de m'aider
(j'ai quand même compris qu'il fallait résoudre x^3 - 4x^2-5=0 car 2(x^2-1)^2 doit etre différent de 0.

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