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Exercice n°2 : (6 points)
Factoriser les expressions :
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A = 3x2 + 6x
B = -6(x + 3) + (3x + 1)(x + 3)
C = (2x - 1)(5x + 2) - (2x - 1)(x + 5)
D = x2 + 10x + 25
E = 9x2 - 12x + 4
F = 36x2 - 25