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Guizoo
@Guizoo
May 2019
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Bonjour, quelqu'un pourrait-il m'aider s'il vous plaît ?
Factoriser l'expression suivante :
A = (x + 7)² - 25
Merci à tout ceux qui m'aideront
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anylor
Bonjour
A = (x + 7)² - 25
on utilise l'identité remarquable a²-b² = (a-b)(a+b)
car tu remarques que 25 = 5×5 =5²
A =(x+7)² - 5²
=(x+7 -5) (x+7 +5)
=(x+2)(x+12)
2 votes
Thanks 1
Guizoo
Merci beaucoup
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Lista de comentários
A = (x + 7)² - 25
on utilise l'identité remarquable a²-b² = (a-b)(a+b)
car tu remarques que 25 = 5×5 =5²
A =(x+7)² - 5²
=(x+7 -5) (x+7 +5)
=(x+2)(x+12)