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Audrey977
@Audrey977
April 2019
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Audrey977
on a factoriser x²-9 qui nous a donner (x+3)(x-3),donc x-3=0.
maintenant il faut trouver les solution et faire le tableau de variation de x²-9.
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Commentaires (1)
X² - 9 = 0
(x + 3)(x - 3) = 0
x + 3 = 0 ou x - 3 = 0
x = - 3 ou x = 3
S= {- 3 ; 3}
Tableau de variation :
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audrey977
merciiiiiiiiiii
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(x + 3)(x - 3) = 0
x + 3 = 0 ou x - 3 = 0
x = - 3 ou x = 3
S= {- 3 ; 3}
Tableau de variation :