Mathématique: problème de second degrée


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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 résoudre une équation de 2 degré ?

L'hypothèse de Riemann Ce problème est considéré par de nombreux mathématiciens comme l'un des plus difficiles de tous les temps.
. Et en effet, l'hypothèse de Riemann n'a jamais été résolue

Quel est le problème mathématique le plus difficile à résoudre ?

Calcul du discriminant : ? = b2 ?4ac = ( ?2)2 ?4(1)(1) = ?2.
. Le discriminant est strictement négatif, la règle est donc "toujours du signe de a", c'est à dire toujours positif car a = 1.










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