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Sagot :

Réponse:

A= 2x (x+1) - (x+1)²

= (x+1) × (2x -( x+1))

= (x+1) × (2x - x - 1)

= (x+1) x (x - 1)

B= 49 - x²

= 7² - x²

= (7 - x ) × (7 + x)

C= 16x² - 64

= 16 (x²- 4 )

= 16 (x - 2 ) × (x+2)

:)

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