Bonjour,
A+ (2x+5) ( 6x+4 +4x+2)
= (2x+5) ( 10x +6)
B= (4x-3) ( 6x+5 +3x-4)
= (4x-3) ( 9x +1)
C= (4x-2) (4x-2 +5x-4)
= (4x-2 ) ( 9x -6)
D= (2x+6) ( 5x-3 + 4)
= (2x+6) ( 5x +1)
E= (6x-5) ( 6x+4 +1)
= (6x-5) ( 6x+5)
F= (3x-5 )² + 1 (3x-5 )
= (3x-5) ( 3x-5 +1)
= (3x-5) ( 3x -4)
