Verified answer

On utilise les identités remarquables :

a) (x + 4)² = x² + 8x + 16

b) (10x - 5)² = 100x² - 100x + 25

c) (2x + 3)² = 4x² + 12x + 9

d) (x - 4)(x + 4) = x² - 16

e) (7x + 1)(7x - 1) = 49x² - 1