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Emilie09
@Emilie09
April 2019
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Un exercice de math qui peut m'aider svp merci .. C'est pour demain
N"97)
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Commentaires (1)
A)
D= 9x²-4+ (3x-2)(x-3)
D= 9x²-4+3x²-9x-2x+6
D= 12x²-11x+2
b)
9x²-4
(3x-2)(3x+2)
(3x-2)(3x+2+x-3)
(3x-2)(4x-1)
c)
pour x= 0
(3X0-2)(4X0-1) = -2X(-1) = 2
pour x= -1
(3X(-1)-2)(4X(-1)-1) = (-3-2)X(-4-1) = -5X(-5) = 25
pour x= 2/3
(3X (2/3) -2) X (4X (2/3) -1) = (2-2) X ((8/3)-1) = 0X (5/3) = 0
pour x= 1/4
(3X (1/4) -2) X (4X (1/4) -1) = ((3/4) -2) X (1-1) = (-5/4) X 0 = 0
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emilie09
June 2021 | 0 Respostas
SVP aider moi pour le 30-31) Merci
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emilie09
June 2021 | 0 Respostas
SVP, vous pouvais m'aider?
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emilie09
June 2021 | 0 Respostas
Bonjour j'ai besoin d'aide stp ..
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emilie09
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emilie09
June 2021 | 0 Respostas
Je doit demander des questions a ma famille pendant la guerre, mais comme il sont pas la et que ses pour demain donc vous pouvais me dire quoi? merci de repondre :)
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emilie09
June 2021 | 0 Respostas
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D= 9x²-4+ (3x-2)(x-3)
D= 9x²-4+3x²-9x-2x+6
D= 12x²-11x+2
b)
9x²-4
(3x-2)(3x+2)
(3x-2)(3x+2+x-3)
(3x-2)(4x-1)
c)
pour x= 0
(3X0-2)(4X0-1) = -2X(-1) = 2
pour x= -1
(3X(-1)-2)(4X(-1)-1) = (-3-2)X(-4-1) = -5X(-5) = 25
pour x= 2/3
(3X (2/3) -2) X (4X (2/3) -1) = (2-2) X ((8/3)-1) = 0X (5/3) = 0
pour x= 1/4
(3X (1/4) -2) X (4X (1/4) -1) = ((3/4) -2) X (1-1) = (-5/4) X 0 = 0