bonjour
x
4 x
4 x + 2
x
2 x
2 x - 5
( 4 x + 2 ) ( 2 x - 5 ) = 8 x² - 20 x + 4 x - 10 = 8 x² - 16 x - 10
si on choisit 1 = ( 4 + 2 ) ( 2 - 5 ) = 6 * - 3 = - 18
avec - 3 = ( - 12 + 2 ) ( - 6 - 5 ) = - 10 * - 11 = 110
E = 12 x² - 24 x - ( 1 - 4 x + 4 x²) + 4 x - 9
E = 12 x² - 24 x - 1 + 4 x - 4 x² + 4 x - 9
E = 8 x² - 16 x - 10