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Exercice 3:
Factoriser les expressions suivantes :
a) 5x + x²
b) x - x²
d) 9x + x(x + 1)
f)(-2x - 5)(-5x-1) + (-2x - 5)(x + 3)
c)(x + 1)(2x + 2) + (x + 1)(5x + 3)
e)(2x + 1)(2x - 2) + (2x − 2)(x+3)



Sagot :

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