aidez moi pour cette exercice svp merci d avance :)​

Bonjour

A = (x - 2) (x + 2)

A = x² - 4

B = (5 - y) (5 + y)

B = 25 - y²

C = (3x + 5) (3x - 5)

C = 9x² - 25

D = (10 - 7z) (10 + 7z)

D = 100 - 49z²

E = (5 + 4g) (5 - 4g)

E = 25 - 16g²

F = (2,1x - 3) (2,1x + 3)

F = 4,41x² - 9

G = (2i + 6,1) (2i - 6,1)

G = 4i² - 37,21

H = (3,2j+ 4) (4 - 3,2j)

H = - 10,24j² + 16.