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Marie237
@Marie237
May 2019
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Bonsoir pouvez vous m'aider juste pour le C(x) et le D(x) svp?
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NajimGraphR
Verified answer
Bonsoir,
A)Facteur commun x(81x-25)
B)On applique la dernière identité remarquable ((3x-1)-x) ((3x-1)+x)
C)2ème identité remarquable (3x-3)² + 18
Je te laisse continuer pour la dernière ;)
En espérant t'avoir aidé
En espérant t'avoir aidé
1 votes
Thanks 1
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Bonsoir,
C(x) = 3x² - 18x + 27
C(x) = 3 * x² - 3 * 6x + 9 * 3
C(x) = 3(x² - 6x + 9)
D(x) = (x² - 25) + (x + 5)² - (2 - x)(2x + 10)
D(x) = (x + 5)(x + 5) + (x + 5)² - 2 * 2x + 2 * 10 + - x * 2x - x * 10
D(x) = (x + 5)(x + 5) + (x + 5)² - 4x + 10 - 5x² - 10
D(x) = (x + 5)(x + 5) + (x + 5)² + 2(x + 5)(x - 2)
D(x) = (x + 5)(x - 5 + x + 5 + 2(x - 2))
D(x) = (x + 5)(4x - 4)
D(x) = 4(x+ 5)(x - 1)
2 votes
Thanks 1
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Bonjour j'ai besoin d'aide svp
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je dois faire toute cette feuille svp aider moi
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Bonjour pouvez vous m'expliquer ces exercices svp merci
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Verified answer
Bonsoir,A)Facteur commun x(81x-25)
B)On applique la dernière identité remarquable ((3x-1)-x) ((3x-1)+x)
C)2ème identité remarquable (3x-3)² + 18
Je te laisse continuer pour la dernière ;)
En espérant t'avoir aidé
En espérant t'avoir aidé
C(x) = 3x² - 18x + 27
C(x) = 3 * x² - 3 * 6x + 9 * 3
C(x) = 3(x² - 6x + 9)
D(x) = (x² - 25) + (x + 5)² - (2 - x)(2x + 10)
D(x) = (x + 5)(x + 5) + (x + 5)² - 2 * 2x + 2 * 10 + - x * 2x - x * 10
D(x) = (x + 5)(x + 5) + (x + 5)² - 4x + 10 - 5x² - 10
D(x) = (x + 5)(x + 5) + (x + 5)² + 2(x + 5)(x - 2)
D(x) = (x + 5)(x - 5 + x + 5 + 2(x - 2))
D(x) = (x + 5)(4x - 4)
D(x) = 4(x+ 5)(x - 1)