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AlexanB
@AlexanB
April 2019
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Bonjour, je n'ai pas compris un exercice de mon DTL, donc le voici :
Exercice 3.
1. Développer et réduire A = (x+4)(x-4)
2. Utiliser le résultat précédent pour calculer, sans poser d’opération et sans calculatrice, 104*96 .
Si vous pourrez m'aider, merci :)
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Commentaires (2)
A = (x+4)(x-4)
= x²-16
104*96 =
(100+4)(100-4) = x²-16 = 100²-16 = 10000-16 = 9984
3 votes
Thanks 1
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= x²-16
104*96 =
(100+4)(100-4) = x²-16 = 100²-16 = 10000-16 = 9984