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the12
@the12
January 2021
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bonjour, j'aurai juste besoin de laide pour l'exercice 2 et 3 s'il vous plaît.
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PAU64
Exercice 2 :
A = (4x - 1)² - 3 (2x - 3) (2x + 3)
A = (4x)² - 2 * 4x * 1 + 1² - 3 [(2x)² - 3²]
A = 16x² - 8x + 1 - 3 (4x² - 9)
A = 16x² - 8x + 1 - 3 * 4x² - 3 * (- 9)
A = 16x² - 8x + 1 - 12x² + 27
A = 4x² - 8x + 28
B = (3x + 2) (5x - 1) + (x + 2)²
B = 3x * 5x + 3x * (- 1) + 2 * 5x + 2 * (- 1) + x² + 2 * x * 2 + 2²
B = 15x² - 3x + 10x - 2 + x² + 4x + 4
B = 16x² + 11x + 2
Exercice 3 :
C = 28x - 21
C =
7
* 4 * x -
7
* 3
C = 7 (4x - 3)
D = 9x² - 12x
D = 3 *
3 * x
* x -
3 * x
* 4
D = 3x (3x - 4)
E =
(2x - 1)
(5x - 7) -
(2x - 1)
(- x + 3)
E = (2x - 1) [(5x - 7) - (- x + 3)]
E = (2x - 1) (5x - 7 + x - 3)
E = (2x - 1) (6x - 10)
1 votes
Thanks 1
PAU64
* désigne "fois"
the12
Merci beaucoup
PAU64
de rien :)
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Bonjour, je coince pouvez vous m'aider svp
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bonjour, je voudrais juste de l'aide pour l'exercice 1 svp
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A = (4x - 1)² - 3 (2x - 3) (2x + 3)
A = (4x)² - 2 * 4x * 1 + 1² - 3 [(2x)² - 3²]
A = 16x² - 8x + 1 - 3 (4x² - 9)
A = 16x² - 8x + 1 - 3 * 4x² - 3 * (- 9)
A = 16x² - 8x + 1 - 12x² + 27
A = 4x² - 8x + 28
B = (3x + 2) (5x - 1) + (x + 2)²
B = 3x * 5x + 3x * (- 1) + 2 * 5x + 2 * (- 1) + x² + 2 * x * 2 + 2²
B = 15x² - 3x + 10x - 2 + x² + 4x + 4
B = 16x² + 11x + 2
Exercice 3 :
C = 28x - 21
C = 7 * 4 * x - 7 * 3
C = 7 (4x - 3)
D = 9x² - 12x
D = 3 * 3 * x * x - 3 * x * 4
D = 3x (3x - 4)
E = (2x - 1) (5x - 7) - (2x - 1) (- x + 3)
E = (2x - 1) [(5x - 7) - (- x + 3)]
E = (2x - 1) (5x - 7 + x - 3)
E = (2x - 1) (6x - 10)