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Sagot :

A = x(12x+14)
B = x^2(27x^2-18x-15)
C = (x-5)((3x-2)+(x-5))=(x-5)(4x-7)
D = (5x+2)((x+7)-3(5x+2)=(5x+2)(14x+1)
E = (5x-2)(1+4(2x+1)=(5x+2)(8x+5)
F = (2x+3)(7x+1)
G = (5x-1)((2x+3)-1)=(5x-1)(2x+2)

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