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Sagot :

Bonjour,

a. (x + 4)² = x² + 8x + 16

b. (y - 3)² = y² - 6y + 9

c. (k + 6) (k - 6) = k² - 36

d. (3x + 2)² = 9x² + 12x + 4

e. (1 - 7x) (1 + 7x) = 1 - 49x²

f. (3x - 8)² = 9x² - 48x + 64

g. (10y + 3) (10y - 3) = 100y² - 9.

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