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Sagot :

Bonjour

D = (x - 2,5)²

D = x² - 5x + 6,25

E = (1 - x) (1 + x)

E = 1 - x²

F = (6 + x)²

F = 36 + 12x + x²

G = (x - 3) (x + 3)

G = x² - 9.

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