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Sagot :

Bonsoir

a. 2x(x - 1) + 3x = x (2x + 1)

b. (x + 1) (x + 2) + 5 (x + 2) = (x + 2) (x + 6)

c. 3x² + 9x = 3x (x + 3)

d. x² - 6x = x (x - 6).

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