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Sagot :

VINS

bonjour

a ( x)  =  ( x + 2 ) ( x + 3 - x - 2 ) = ( x + 2 )

b (x)  =  ( 2 x + 3 ) ( 2 x - 1 - 7 x + 6 )  = ( 2 x + 3 ) ( - 5 x + 5 )

=  - 5 ( 2 x + 3 ) ( x - 1 )

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