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Exercice 2

Factoriser les expressions suivantes en repérant un facteur commun :

a- (2x + 9)(x - 9) - 2(x - 9)(2x - 9)

b- (1 - 2x)² - 3(6x + 3)(1 - 2x)

c- (3x - 11)² + (3x - 11)

Exercice 3

a. 3x/2x - 1 + 4x - 1/x

b. x + 2/x - 1 - x + 3/x + 2

c. 2x + 3/x + 1 - 3x - 2/x - 1

d. 5 - 2/3x - 2 + 1/2x + 3
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