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Aidezsvpurgent
@Aidezsvpurgent
April 2019
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URGENT SVP IL FAUT LE RENDRE POUR MARDI
on considère l'expression E=( 4x+5)²-(2x-7)²
1. développer l'expression E
2. en utilisant l'identité remarquable a² - b², factoriser l'expression F
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evaa02100
E= a^2-b^2 = (a+b)(a-b)
avec a=4x+5 et b=2x-7
donc E=(4x+5+2x-7)(4x+5-(2x-7)) = (6x-2)(2x+12)
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avec a=4x+5 et b=2x-7
donc E=(4x+5+2x-7)(4x+5-(2x-7)) = (6x-2)(2x+12)