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Annie569
@Annie569
April 2019
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Bonjour j'ai un exercice de maths noter pour demain et j'ai besoins de votre aide. ;pièce jointe: 1: Développer , 2: avec la forme développer trouver pour x=2
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nathalienouts
(16-25x²)-3(4-5x)(3x+9)
= 16-25x²-3(12x+36-15x²-45x)
= 16-25x²-3(-15x²-33x+36)
= 16-25x²+45x²+33x-108
= 20x²+33x-92
pour x = 2 on a :
= 20x2²++33x2-92
= 20x4+66-92
= 80+66-92
= 54
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= 16-25x²-3(12x+36-15x²-45x)
= 16-25x²-3(-15x²-33x+36)
= 16-25x²+45x²+33x-108
= 20x²+33x-92
pour x = 2 on a :
= 20x2²++33x2-92
= 20x4+66-92
= 80+66-92
= 54