Vous pouvez m’aider svp

Exercice 1:

E

[tex] = x ^{2} - 8x + 16 - (9x ^{2} + 12x + 4)[/tex]

[tex] = x^{2} - 8x + 16 - 9 {x}^{2} - 12x - 4[/tex]

[tex] = - 8 {x}^{2} - 20x + 12[/tex]

2)

[tex] = (x - 4 - 3x - 2) \times (x - 4 + 3x + 2)[/tex]

[tex] = ( - 2x - 6) \times (4x - 2)[/tex]

[tex] = ( - 2(x + 3)) \times 2(2x - 1)[/tex]

[tex] = - 2 \times 2(x + 3) \times (2x - 1)[/tex]

[tex] = - 4( x + 3) \times (2x - 1)[/tex]