Aider moi svp j’y arrive pas

Bonsoir,

D = (x + 2) (3x - 1) - (4x + 1) (x + 2)
D = (x + 2) [(3x - 1) - (4x + 1)]
D = (x + 2) (3x - 1 - 4x - 1)
D = (x + 2) (- x - 2)

E = (x - 1)² - 9
E = (x - 1)² - 3²
E = (x - 1 - 3) (x - 1 + 3)
E = (x - 4) (x + 2)

F = essaie

D=
[tex](x + 2)(3x - 1-4x + 1) = \\ (x + 2)( - x - 2)[/tex]
E=
[tex](x - 1) {}^{2} - 3 {}^{2} = \\(x - 1 - 3)(x - 1 + 3) \\ = (x - 4)(x + 2)[/tex]
F
[tex]2(4x {}^{2} - 12x + 9)[/tex]