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LOUdu22
@LOUdu22
April 2019
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Bonjour pouvez-vous m'aider pour les exercices 1 et 2 SVP
Merci voici les exos par PDF et scann
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slyz007
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Exercice 1 :
1) Réponse c : (x-1)²=x²-2x+1
2) Réponse c : (y+2)(y-2)=y²-4
3) Réponse c : 7u²-1=6 ⇔ 7u²-7=0 ⇔ u²-1=0 ⇔ (u+1)(u-1)=0
4) Réponse a : z²+6z+9=(z+3)²
Exercice 2 :
a) (2x+5)²=4x²+20x+25
b) 4x²+20x+25=-7
⇔(2x+5)²=-7
Un carré est toujours positif donc l''équation (2x+5)²=-7 n'a pas de solution.
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Thanks 1
LOUdu22
merci beaucoup
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Bonjour quelqu'un pourrait il m'aider pour l'exercice 1 et 2 de mon devoir merci d'avance ps: il y a un PDF
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Bonjour pouvez-vous m'aider pour l'exercice 1 svp,merci il y a un scann
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Bonjour pouvez-vous m'aider pour l'exercice 4 svp merci voici un scann et un pdf
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Verified answer
Exercice 1 :1) Réponse c : (x-1)²=x²-2x+1
2) Réponse c : (y+2)(y-2)=y²-4
3) Réponse c : 7u²-1=6 ⇔ 7u²-7=0 ⇔ u²-1=0 ⇔ (u+1)(u-1)=0
4) Réponse a : z²+6z+9=(z+3)²
Exercice 2 :
a) (2x+5)²=4x²+20x+25
b) 4x²+20x+25=-7
⇔(2x+5)²=-7
Un carré est toujours positif donc l''équation (2x+5)²=-7 n'a pas de solution.