Bonjour SVP c'est pour demain​

Bonjour,

Factoriser :

1) B = x² - 8x + 16

B = x² + 2 * 4 * x + 4²

B = (x + 4)²

2) C = 36x² + 96x + 64

C = (6x + 8)²

3) D = (5x - 3)² - 144

D = (5x - 3)² - (12)²

D = (5x - 3 - 12) (5x - 3 + 12)

D = (5x - 15) (5x + 9)

4) E = (9x + 7)² - (4x - 15)²

E = (9x + 7 + 4x - 15) (9x + 7 - 4x + 15)

E = (13x - 8) (5x + 22).