bonsoir
E : ( 2 x - 3 )² = 1
1. ( 2 x - 3 )² - 1 = 0
( 2 x - 3 ) ( 2 x - 3 - 1 ) = 0
( 2 x - 3 ) ( 2 x - 4 ) = 0
donc x = 3/2 ou 2
2. ( 2 x - 3 )² = 1
( 2 x - 3 )² - 1 ² = 0
( 2 x - 3 - 1 ) ( 2 x - 3 + 1 ) = 0
( 2 x - 4 ) ( 2 x - 2 ) = 0
x = - 4/2 = - 2 ou bien 2/2 = 1
