Bonjour
A = (3x + 7 ) ( 6x - 2 ) + 8 ( 6x - 2 )
= ( 6x - 2 ) ( 3x + 7 + 8 )
= 2 ( 3x - 1 ) ( 3x + 15 )
= 2 * 3 ( 3x - 1 ) ( x + 5 )
= 6 ( 3x-1) ( x + 5 )
B pareil que la A attention au signe
je commence et je te laisse terminer
B = ( 5 - 2x ) ( 4x - 3 ) - ( 4x - 3 ) ( 8x - 2 )
= (4x - 3 ) ( 5 - 2 x - 8 x + 2 )
= ...
C = ( x + 6 )² - ( -3x + 8 ) ( x + 6 )
= ( x + 6 ) ( x + 6 + 3 x - 8 )
= ....
D = ( 4x + 1 ) ( 3x - 1 ) + ( 1 - 3x ) ( 5x - 9 )
= ( 3x - 1 ) ( 4x + 1 - 5x + 9 )
= ....
bonne journée
