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Exercice 5: Factorise les expressions suivantes. A = 3x² + x E = 4x² + 4x + 4 B = 81² + 2t F = 5x² + 10x + 15 C= 24x + 30y - 18z G=9y²-3y + 27 D = 3y² +9y² H = -x + 3x²​

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