bonjour
B (x) = ( 2 x - 5 ) ( 2 x - 5 - 3 )
B (x) = ( 2 x - 5 ) ( 2 x - 8 )
B (x) = 2 ( 2 x - 5 ) ( x - 4 )
F (x) = ( x + 1 ) ( x + 1 + 1 )
F (x) = ( x + 1 ) ( x + 2 )
d (x) = ( x + 3 ) ( x + 3 - 3 + x + 2 )
D ( x) = ( x + 3 ) ( 2 x + 2 )
D (x) = 2 ( x + 3 ) ( x + 1)