bonjour
( 2 x + 1)² - ( x + 5)² = 0
( 2 x + 1 + x + 5) ( 2 x + 1 - x - 5) = 0
( 3 x + 6) ( x - 4) = 0
soit 3 x + 6 = 0 soit x - 4 = 0
3 x = - 6 donc x = - 6/3 = - 2 x = 4
(4 x² - 9) - 2 ( 2 x - 3) + ( 2 x - 3) = 0
( 2 x - 3) ( 2 x + 3) - 2 ( 2 x - 3) + ( 2 x - 3) = 0
(2 x - 3) ( 2 x + 3 - 2 + 1) = 0
( 2 x - 3) ( 2 x + 2) = 0
soit 2 x - 3 = 0 soit 2 x + 2 = 0
2 x = 3 et x = 3/2 2 x = - 2 et x = - 2/2 = - 1
