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SOSmath62
@SOSmath62
May 2019
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Bonjour j'ai eu un dm de math et je suis pas très fort est j'ai fait un peux du 2 et du 3 4 mais sa serait sympas de m'aidait merci d'avance
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ProfdeMaths1
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Ex 3 :
I=(3x-5)²-(x+7)(3x-5)
=(3x-5)(3x-5-x-7)
=(3x-5)(2x-12)
=6x²-46x+60
si x=5/3 alors I=0
car 3x-5 s'annule en x=5/3
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SOSmath62
Merci pour votre aide
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Verified answer
Ex 3 :I=(3x-5)²-(x+7)(3x-5)
=(3x-5)(3x-5-x-7)
=(3x-5)(2x-12)
=6x²-46x+60
si x=5/3 alors I=0
car 3x-5 s'annule en x=5/3