résolution algébrique d'une équation du second degré


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Les principales étapes de cette méthode de résolution sont : On ramène l'équation du second degré à une variable sous la forme ax2+bx+c=0, a x 2 + b x + c = 0 , si ce n'est pas déjà le cas. On évalue le discriminant b2?4ac b 2 ? 4 a c et on vérifie s'il vaut la peine de poursuivre.

Comment résoudre algébriquement une équation du second degré ?

Pour résoudre une équation du second degré de la forme ax^2+bx+c=0, on détermine les éventuelles racines du trinôme.
. Le nombre appelé discriminant du trinôme est particulièrement utile dans la recherche des solutions d'une équation du second degré.

Comment résoudre équation algébrique ?

Recherche de racine(s) et signe d'un polynôme : Un polynôme du second degré P(x) = ax² + bx + c admet au plus deux racines. Le nombre exact de ses racines est déterminé par le signe d'un expression notée ? qu'on appelle le discriminant. ? = b² - 4ac.










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