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Sagot :

Bonsoir,

-(2x-4)(6x+2)+4x²-16

4x² -16 = (2x-4) (2x+4)

identité remarquable

-(2x-4)(6x+2)+  (2x-4) (2x+4)

= (2x-4) ( -6x -2 + 2x+4)

= (2x-4) (-4x +2)

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