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venus350
@venus350
June 2021
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Bonjour je comprend pas vraiment les exercices ! Il y'a le 75 seulement et le 76 il faut detailler mais j'ai vraiment du mal! Mercii d'avance
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winner123
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Bonjour
numéro 76
G = ( 3 x + 2)² - ( 3 x +2) ( x +7)
G = 9 x² + 12 x + 4 - ( 3 x² + 21 x + 2 x + 14)
G = 9 x² + 12 x + 4 - 3 x² - 21 x - 2 x - 14
G = 6 x² -11 x - 10
factorisation
(3 x +2) ( 3 x +2 - x - 7)
(3 x +2) ( 2 x - 5)
pour x = 2.5
G = 7.5+ 2 ( 5 - 5) = 9.5 x 0 = 0
pour x = 0 , G = 2 x - 5 = - 10
pour x = - 1, G = ( - 3 + 2) ( - 2 - 5) = ( - 1) ( - 7) = 7
numéro 75
D = 16 x² + 40 x +25 - 20 x - 25
d = 16 x² + 20 x
E = 14 x² + 35 x - 6 x - 15 + ( 7 x² - 3 x - 28 x + 12)
E = 14 x² + 29 x - 15 + 7 x² - 31 x + 12
E = 21 x² - 2 x - 3
F = 10 x² - 16 x - ( 15 x² - 24 x + 5x - 8)
F = 10 x² - 16 x + 15 x² + 24 x - 5 x + 8
F = 25 x² + 3 x + 8
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venus350
Merci beaucoup !!!
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Lista de comentários
Verified answer
Bonjournuméro 76
G = ( 3 x + 2)² - ( 3 x +2) ( x +7)
G = 9 x² + 12 x + 4 - ( 3 x² + 21 x + 2 x + 14)
G = 9 x² + 12 x + 4 - 3 x² - 21 x - 2 x - 14
G = 6 x² -11 x - 10
factorisation
(3 x +2) ( 3 x +2 - x - 7)
(3 x +2) ( 2 x - 5)
pour x = 2.5
G = 7.5+ 2 ( 5 - 5) = 9.5 x 0 = 0
pour x = 0 , G = 2 x - 5 = - 10
pour x = - 1, G = ( - 3 + 2) ( - 2 - 5) = ( - 1) ( - 7) = 7
numéro 75
D = 16 x² + 40 x +25 - 20 x - 25
d = 16 x² + 20 x
E = 14 x² + 35 x - 6 x - 15 + ( 7 x² - 3 x - 28 x + 12)
E = 14 x² + 29 x - 15 + 7 x² - 31 x + 12
E = 21 x² - 2 x - 3
F = 10 x² - 16 x - ( 15 x² - 24 x + 5x - 8)
F = 10 x² - 16 x + 15 x² + 24 x - 5 x + 8
F = 25 x² + 3 x + 8