Réponse:
Bonjour
A = x² + 6x + 9 - x² - 2x
A = 4x + 9
B = 4x² - 12x + 9 + 3x² - 6x + x - 2
B = 7x² - 17x + 7
C = (3x)² - 7² - (4x² + x - 4x - 1)
C = 9x² - 49 - 4x² + 3x + 1
C = 5x² + 3x - 48
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Réponse:
Bonjour
A = x² + 6x + 9 - x² - 2x
A = 4x + 9
B = 4x² - 12x + 9 + 3x² - 6x + x - 2
B = 7x² - 17x + 7
C = (3x)² - 7² - (4x² + x - 4x - 1)
C = 9x² - 49 - 4x² + 3x + 1
C = 5x² + 3x - 48