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Maths484
@Maths484
April 2019
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Bonjour, pouvez vous m'aider pour cette équation.
(2x + 1) ( -
x + 2) = 2
Merci d'avance de votre aide.
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hlaissisaad
(2x + 1) ( -x + 2) = 2 -2x² + 4x -x + 2 = 2 -2x² + 3x = 0
x(-2x + 3) = 0
donc x=0 ou x = 3/2
S = {0, 3/2]
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Commentaires (1)
Signalement d'un abus
L'équation de base, ce n'est pas ça, c'est : (2x + 1) (-1/2 x + 2) = 2
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Meilleure réponse !
anno32
Explorateur
Bonjour
Résolvons: (2x + 1) ( -1/2x + 2) = 2
Transposons le 2 du deuxième membre et Développons
(2x + 1) ( -1/2x + 2) = 2
(2x + 1) ( -1/2x + 2) - 2 = 0
-x + 4x - 1/2x + 2 - 2 = 0
-x + 4x - 1/2x = 0
3x - 1/2x = 0
6/2x - 1/2x = 0
5/2x = 0
x = 0
S = {0}
2 votes
Thanks 1
anno32
salut slyz007 t'as vu juste et merci de ton intervention
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x(-2x + 3) = 0
donc x=0 ou x = 3/2
S = {0, 3/2]