bonjour
( x - 6 ) ( 4 x + 1 ) - 2 x ( x - 6 ) = 0
( x - 6 ) ( 4 x + 1 - 2 x ) = 0
( x - 6 ) ( 2 x + 1 ) = 0
x = 6 ou - 1 /2
x² - 16 = 0
( x - 4 ) ( x + 4 ) = 0
x = 4
( 3 x + 1 ) ( x - 4 ) = 2 ( x + 1 ) ( x - 4 )
( 3 x + 1 ) ( x - 4 ) - 2 ( x + 1 ) ( x - 4 ) = 0
( x - 4 ) ( 3 x + 1 - 2 x - 2 ) = 0
( x - 4 ) ( x - 1 ) = 0
x = 4 ou 1
( x + 6 ) - x ( x + 6 ) = 0
- x ( x + 6 ) = 0
x = 0 ou - 6
3 x - 9 = 0
3 x = 9
x = 9/3 = 3
