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Hayden
@Hayden
April 2019
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J'ai UURGEMENT BESOIN DE VOTRE AIDE s'il vous plait !!!
+ 15 pts !!!!
quelle est la solution de l'équation :
(x+2)^{2} - (x+1)^{2} = 1
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nathalienouts
Bonsoir,
(x+2)²-(x+1)² = 1
⇔ (x²+4x+4)-(x²+2x+1) = 1
⇔ x²+4x+4-x²-2x-1 = 1
⇔2x+3 = 1
⇔ 2x = 1-3
⇔ 2x = -2
⇔ x = -2/2
⇔ x= -1
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Lista de comentários
(x+2)²-(x+1)² = 1
⇔ (x²+4x+4)-(x²+2x+1) = 1
⇔ x²+4x+4-x²-2x-1 = 1
⇔2x+3 = 1
⇔ 2x = 1-3
⇔ 2x = -2
⇔ x = -2/2
⇔ x= -1