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Sagot :

1 A= 3(x-5)
= 3x-15
B = x( 4-2x)
= 4x -2x^2
C= 5/6 -5/2 x ( reponse )
D= 3x^2 -3x+5x-10
= 3x^2 +2x-10
E=3x x 1/2x -3x x 2
= -3/2x^2 -6x

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