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Sagot :

Bonsoir,

(x+7) ( x+1 -1)

=(x+7)( x)

(2x-5) ( 2x-5 -x-2)

= (2x-5) ( x -7)

(2x+1) (  1 + 5x -3x)

= (2x+1) ( 1 +2x)

(x-8) (x-8 +1)

= (x-8) (  x-7)

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