bonjour
( 2 x + 4 )² - ( 2 x + 4 ) ( - x + 12 ) = 0
( 2 x + 4 ) ( 2 x + 4 + x - 12 ) = 0
( 2 x + 4 ) ( 3 x - 8) = 0
soit 2 x + 4 = 0 et x = - 2
soit 3 x - 8 = 0 et x = 8 /3
( - 7 x + 11 )² = 36
( - 7 x + 11 )² - 36 = 0
( - 7 x + 11 - 6 ) ( - 7 x + 11 + 6 ) = 0
( - 7 x + 5 ) ( - 7 x + 17 ) = 0
soit - 7 x + 5 = 0 ⇔ - 7 x = - 5 ⇔ x = 5/7
soit - 7 x + 17 = 0 ⇔ - 7 x = - 17 ⇔ x = 17/7