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Exercice 5 : Factorise les expressions suivantes, si cela est possible.
G = 2(3a - 1)(7a + 2) - (72+ 2)(52-3)
E = 3(5 a + 2) + (32-5)(5a + 2)
H = (5x - 3)(2x + 7) + 3(5x - 3)(8x - 1)
F = (x + 4)(9x - 5) + 9x-5

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