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Roxanevivier30
@Roxanevivier30
May 2019
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Bonsoir vous pouvez m'aider svp a cette exo ça serait très gentil (3eme)
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Commentaires (1)
Appelons a et b ces deux nombres, on aurait d'après l'affirmation :
(a-b)²+4ab = (a+b)²
(a-b)²+4ab
= a²-2ab+b²+4ab = a²+2ab+b² =
(a+b)²
l'affirmation est donc vraie
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(a-b)²+4ab = (a+b)²
(a-b)²+4ab = a²-2ab+b²+4ab = a²+2ab+b² = (a+b)²
l'affirmation est donc vraie