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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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chipie30
(x+2)² - (x+1)² = 1
(x² + 2*x*2 + 2²) - (x² + 2*x*1 + 1²) = 1
(x² + 4x + 4) - (x² + 2x + 1) = 1
x² + 4x + 4 - x² - 2x - 1 = 1
2x + 3 = 1
2x = -2
x = -2/2
x = -1
0 votes
Thanks 1
chipie30
Ben si c'est bon l'equation est juste pour x = -1
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(x² + 2*x*2 + 2²) - (x² + 2*x*1 + 1²) = 1
(x² + 4x + 4) - (x² + 2x + 1) = 1
x² + 4x + 4 - x² - 2x - 1 = 1
2x + 3 = 1
2x = -2
x = -2/2
x = -1