Bonjour pourriez vous m’aidez svp exercice 38,39

Bonjour,

38)

A = 3x - 3

A = 3 (x - 1)

B = 4y + 6

B = 2 (3y + 3)

C = 8 + 2n

C = 2 (4 + n)

D = 7x² - 5x

D = x (7x - 5)

E = 30a + 36a²

E = 6a (5 + 6a)

F = - 2x² - 2

F = -  2 (x² + 1)

39)

a. (x + 5)² →  x² + 10x + 25

b. (x - 6)² →  x² - 12x + 36

c. 4 (x + 5)² →  4x² + 40x + 100

d. (x + 10) (x - 10) → x² - 100

e. (x - 11) (x + 11) → x² - 121

f. (7x - 1)² →  49x² - 14x + 1.