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claraP75
@claraP75
January 2021
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Bonjour je dois faire l'exercice 50 pour demain, de l'aide svp ? ;) merci
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louisXIV
Bonjour, voici l'EX 50:
Si un produit de facteurs est nul alors un des facteurs au moins est nul.
a)
= 0
=0
(x+2)(x+2) = 0
x+2=0
x=-2
b)
= 0
=0
(7x-2)(7x-2) = 0
7x-2 = 0
x=
c)
= 0
(x-4)(x+4) = 0
x-4 = 0 ou x+4 = 0
x=4 x=-4
d) 81 -
(9-5x)(9+5x) = 0
9-5x = 0 ou 9+5x = 0
x =
x = -
1 votes
Thanks 1
claraP75
d'accord merci beaucoup ! :)
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Lista de comentários
Si un produit de facteurs est nul alors un des facteurs au moins est nul.
a) = 0
=0
(x+2)(x+2) = 0
x+2=0
x=-2
b) = 0
=0
(7x-2)(7x-2) = 0
7x-2 = 0
x=
c) = 0
(x-4)(x+4) = 0
x-4 = 0 ou x+4 = 0
x=4 x=-4
d) 81 -
(9-5x)(9+5x) = 0
9-5x = 0 ou 9+5x = 0
x = x = -