bonsoir
a. ( 2 x - 3 ) ( x + 2 - 5 )
= ( 2 x - 3 ) x - 3 )
b . ( 5 x + 1 ) ( 3 x - 5 - x + 3 )
= ( 5 x + 1 ) ( 2 x - 2 )
= 2 ( 5 x + 1 ) ( x - 1 )
c. ( 3 x + 2 ) ( - 5 x - 7 - x - 7 )
= ( 3 x + 2 ) ( - 6 x - 14 )
= 2 ( 3 x + 2 ) ( - 3 x - 7 )
d . ( 7 x - 3 ) ( 5 x - 8 - 7 x + 3 )
= ( 7 x - 3 ) ( - 2 x - 5 )
