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Reem
@Reem
May 2019
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Bonjour à tous
Ex. 56 #2 Méthode algébrique
Svp
Merci d'avance
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salemelas
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Voila ta reponse bonne journée
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maxoum001
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Si f(x)=0, alors (x-1)²-4=0
On rajoute 4 de part et d'autre, ce qui ne modifie en rien le resultat
(x-1)²-4 +4 = 0 +4
donc aprés reduction
(x-1)²=4
on peut conclure : (x-1)=racine carée de 4
(x-1)=2
donc x=3
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Reem
mais il y a deux réponses normalement
maxoum001
ah autant pour moi, je suis pas parti sur a²-b²=0, il me manque la réponse x=-1.... j'ai eété un peu vite
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Verified answer
Voila ta reponse bonne journéeVerified answer
Si f(x)=0, alors (x-1)²-4=0On rajoute 4 de part et d'autre, ce qui ne modifie en rien le resultat
(x-1)²-4 +4 = 0 +4
donc aprés reduction
(x-1)²=4
on peut conclure : (x-1)=racine carée de 4
(x-1)=2
donc x=3