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Lisa52
@Lisa52
May 2019
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Résoudre l'équation suivante:
(3x+4)²=49
pouvez vous m'aidez svp merci bcp
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nadiab
Verified answer
Résoudre l'équation
(3x+4)²-49= 0 identité remarquable
(3x+4)²-7²
(3x+4+7)(2x+4-7)=0
(3x+11)(3x-3)=0
3x+11=0 ou 3x-3=0
x = -11/3 x = 1 S = { -11/3 ; 1 }
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Verified answer
Résoudre l'équation(3x+4)²-49= 0 identité remarquable
(3x+4)²-7²
(3x+4+7)(2x+4-7)=0
(3x+11)(3x-3)=0
3x+11=0 ou 3x-3=0
x = -11/3 x = 1 S = { -11/3 ; 1 }