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Sagot :

Bonsoir,

1)  A = (2x-3) (4x+1) - (2x-3) (3x-5)

    A =  8x²+2x -12x-3 - 6x²+10x+9x-15

    A = 2x² +9x-18

2)  B=  (2x-3) (4x+1) - (2x-3) (3x-5)

    B=   (2x-3)  ( 4x+1-3x+5)

    B=  (2x-3)  ( x+6)

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