bonjour
( 2 - 3 x ) ( x + 4 ) - ( 2 - 3 x ) ( x + 2 ) = 0
( 2 - 3 x ) ( x + 4 - x - 2 ) = 0
( 2 - 3 x ) ( 2 ) = 0
2 - 3 x = 0 ⇔ - 3 x = - 2 ⇔ x = 2 /3
( x - 2 ) ( 2 x + 1 ) = ( x - 2 )²
( x - 2 ) ( 2 x + 1 ) - ( x - 2 )² = 0
( x - 2 ) ( 2 x + 1 - x + 2 ) = 0
( x - 2 ) ( x + 3 ) = 0
x = 2 ou - 3
