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Cam212001
@Cam212001
May 2019
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Bonjour j'ai un gros problème d'incompréhension sur l'exercice suivant puis-je avoir votre aide!
Exo 1 factoriser :
B= 25x au carré -70+49
C= (3x-3) (2x+7)-(9x au carré -9)
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supersong
Verified answer
Bonsoir,
Exo 1:
B= 25x² - 70 + 49
5² = 25 et 7² = 49
Donc
B= (5x - 7)²
C = (3x-3) (2x+7)-(9x²- 9)
C = (3x-3)(2x+7) - [(3x)² - 3²]
C = (3x-3) (2x+7)- (3x - 3)(3x + 3)
C = (3x-3)(2x + 7 - 3x - 3)
C = (3x-3)(-x+4)
2 votes
Thanks 0
cam212001
Merci beaucoup!
supersong
:)
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Verified answer
Bonsoir,Exo 1:
B= 25x² - 70 + 49
5² = 25 et 7² = 49
Donc B= (5x - 7)²
C = (3x-3) (2x+7)-(9x²- 9)
C = (3x-3)(2x+7) - [(3x)² - 3²]
C = (3x-3) (2x+7)- (3x - 3)(3x + 3)
C = (3x-3)(2x + 7 - 3x - 3)
C = (3x-3)(-x+4)