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Sagot :

Réponse :

Explications étape par étape

Bsr,

A= 12x +21 +8x -36 = 20x- 15

B= 14x² -35x -2x² +5x = 12x² -30x

C= 6x² +14x -15x -35 = 6x² -x -35

D= 6x² -4x -15x +10 = -x² -19w +10

5a-10b = 5(a-2b)

2x²-x= x(2x-1)

(x+2) ( 2x-1 +3x+2) = (x+2)( 5x +1)

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