Réponse :
bonjour
E = ( 2 x - 3 )² = 1
1. ( 2 x - 3 )² - 1 = 0
( 2 x - 3 - 1 ) ( 2 x - 3 + 1 ) = 0
( 2 x - 4 ) ( 2 x - 2 ) = 0
soit 2 x - 4 = 0 et x = 4/2 = 2
soit 2 x - 2 = 0 et x = 2/2 = 1
2. 2 x - 3 = 1
2 x = 1 + 3
2 x = 4
x = 2
2 x - 3 = - 1
2 x = - 1 + 3
2 x = 2
x = 1
Explications étape par étape :
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Réponse :
bonjour
E = ( 2 x - 3 )² = 1
1. ( 2 x - 3 )² - 1 = 0
( 2 x - 3 - 1 ) ( 2 x - 3 + 1 ) = 0
( 2 x - 4 ) ( 2 x - 2 ) = 0
soit 2 x - 4 = 0 et x = 4/2 = 2
soit 2 x - 2 = 0 et x = 2/2 = 1
2. 2 x - 3 = 1
2 x = 1 + 3
2 x = 4
x = 2
2 x - 3 = - 1
2 x = - 1 + 3
2 x = 2
x = 1
Explications étape par étape :