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PoussinPioou
@PoussinPioou
April 2019
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Bonjour, pouvez vous m'aider s'il vous plait ? :
Développer et Réduire :
A = (6x +3)² B = (7x +2) (7x -2) C = (4x -5)² D = (8x -3) (-5x+2)
Merci d'avance, bon dimanche à tous!
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PAU64
A = (6x + 3)²
A = (6x)² + 2 * 6x * 3 + 3²
A = 36x² + 36x + 9
B = (7x + 2) (7x - 2)
B = (7x)² - 2²
B = 49x² - 4
C = (4x - 5)²
C = (4x)² - 2 * 4x * 5 + 5²
C = 16x² - 40x + 25
D = (8x - 3) (- 5x + 2)
D = 8x * (- 5x) + 8x * 2 - 3 * (- 5x) - 3 * 2
D = - 40x² + 16x + 15x - 6
D = - 40x² + 31x - 6
Les * désignent "fois".
2 votes
Thanks 1
PoussinPioou
Merci beaucoup, vraiment! :D
PAU64
de rien ;)
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A = (6x)² + 2 * 6x * 3 + 3²
A = 36x² + 36x + 9
B = (7x + 2) (7x - 2)
B = (7x)² - 2²
B = 49x² - 4
C = (4x - 5)²
C = (4x)² - 2 * 4x * 5 + 5²
C = 16x² - 40x + 25
D = (8x - 3) (- 5x + 2)
D = 8x * (- 5x) + 8x * 2 - 3 * (- 5x) - 3 * 2
D = - 40x² + 16x + 15x - 6
D = - 40x² + 31x - 6
Les * désignent "fois".