Réponse :
(5x -4)(2x - 1) -4(2x +3) = 10x² -5x -8x +4 -8x -12 = 10x² -26x -8
10x² = 26x +8
x²= (26x +8)/10
x = racine carré de (26 +8)/10
(5x -1)² + (2x -1)(2x +1) = (5x -1)(5x -1) +4x² -2x +2x -1 =25x² - 5x - 5x +1 +4x² -1 = 29x² -10x
29x² = 10 x
x² = 10x/29
x=racine carré de (10x/29)
Explications étape par étape
