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lilou2576
@lilou2576
April 2022
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Bonjour j’aurais besoins d’aide pour cette exercice de maths. Développer les expressions suivantes.
1. A(x) = 2x (x - 1) + (2x + 1)(x+2) 2. B (c) = -3(-7x + 1)
3. C(c) = (-x + 2)(2x - 3)
4. D (x) = 4(-x - 2)(5 – x)
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Vins
Réponse :bonsoirA (x) = 2 x² - 2 x + 2 x² + 4 x + x + 2 = 4 x² + 3 x + 2B (x) = 21 x - 3 C (x) = - 2 x² + 3 x + 4 x - 6 = - 2 x² + 7 x - 6 D (x) = 4 ( - 5 x + x² - 10 + 2 x ) = - 20 x + 4 x² - 40 + 8 x = 4 x² - 12 x - 40 Explications étape par étape :
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DMTRYlo
Bonsoir Vins je vous prie de m'aider en francais svpp? Merci
lilou2576
bonjour ! ce n’est pas moi Vins
Yondaime
Réponse :1) A(x) = 2x (x - 1) + (2x + 1)(x+2)= 2x² - 2x + 2x² + 4x + x + 2= 4x² + 3x + 22) B(x) = -3(-7x + 1)= 21x - 33) C(x) = (-x + 2)(2x - 3)= -2x² + 3x + 4x - 6= -2x² + 7x - 64) D(x) = 4(-x - 2)(5 – x)= 4(-5x + x² - 10 + 2x)= 4(x² - 3x - 10)= 4x² - 12x - 40Bonne soirée :)
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