bonjour
( 2 x + 3 ) ( 3 x - 1 ) - 2 ( 2 x + 3 ) ( - 2 x + 5 ) = 0
( 2 x + 3 ) ( 3 x - 1 - 2( - 2 x + 5 ) = 0
( 2 x + 3 ) ( 3 x - 1 + 4 x - 10 ) = 0
( 2 x + 3 ) ( 7 x - 11 ) = 0
x = - 3/2 ou 11/7
( 3 x + 1 ) / 2 = - 2 x + 6
( 3 x + 1 ) / 2 = ( - 4 x + 12 ) / 2
3 x + 1 = - 4 x + 12
3 x + 4 x = 12 - 1
7 x = 11
x = 11/7
25/ x = 4 x /9
4 x² = 225
x² = 56.25
x = √56.25 ou - √56.25
x = 7.5 ou - 7.5
