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Manooon17111
@Manooon17111
May 2019
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Bonjour j'ai besoin d'aide: niveau 2nd
Résoudre l'inequation:
25x*2-1+(10x+2)(-2x+7) < 0
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nadiab
Bonjour,
25x²-1+(10x+2)(-2x+7) < 0
(5x+1)[5x-1+2(-2x+7)] <0
(5x+1)(5x-1-4x+14) < 0
(5x+1)(x+13) < 0
5x+1=0 ou x+13=0
x= -1/5 x= -13
Avec ton tableau de signe, S= ] -13 ; -1/5 [
2 votes
Thanks 1
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25x²-1+(10x+2)(-2x+7) < 0
(5x+1)[5x-1+2(-2x+7)] <0
(5x+1)(5x-1-4x+14) < 0
(5x+1)(x+13) < 0
5x+1=0 ou x+13=0
x= -1/5 x= -13
Avec ton tableau de signe, S= ] -13 ; -1/5 [