problème second degrés


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PDF SECOND DEGRÉ - maths et tiques

PDF Le second degré

PDF Le second degré

PDF Première générale - Polynômes du second degré - Exercices

PDF Problèmes équations du second degré (1) Correctif : Problèmes

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Comment résoudre un problème du second degré ?

On pose un système de deux équations à deux inconnues.
. Développons la seconde équation : 17l – l² = 60.
. Soit, sous une formulation davantage propice à la résolution d'équations du second degré : -l² + 17l – 60 = 0.
. Le discriminant est égal à ? = 289 – (4 × 60) = 49, soit le carré de 7.

Comment calculer le 2nd degré ?

Définition : Une équation du second degré est une équation de la forme ax2 + bx + c = 0 où a, b et c sont des réels avec a ? 0.
. Une solution de cette équation s'appelle une racine du trinôme ax2 + bx + c .
. Exemple : L'équation 3x2 ? 6x ? 2 = 0 est une équation du second degré.

C'est quoi l'humour du second degré ?

Dans le langage, le second degré consiste à amener à un sens plus subtil que la phrase ne veut le faire croire.
. Il est souvent utilisé dans l'humour noir.

Comment résoudre un système d'équation du second degré ?

Résoudre un tel système revient à trouver le ou les points d'intersection entre une parabole et une droite.
. Pour ce faire, il faut être à l'aise avec la résolution d'une équation de degré 2.
. Il n'y a aucune intersection entre la droite et la parabole.
. La droite est tangente à la parabole.










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