Bonjour : sa serai possible de m'aide pour se devoir merci d'avance sa me ferait hyper plaisir

Bonsoir,

1)
a)
P = 5 x (a + 9)
P = 5 x a + 5 x 9
P = 5a + 45

A = 3 x (10 + b)
A = 3 x 10 + 3 x b
A = 30 + 3b

T = (11 + c) x 7
T = 11 x 7 + c x 7
T = 77 + 7c

L = 2 x (a - 4)
L = 2 x a + 2 x - 4
L = 2a - 8

b)
I = 3 x (a + 5)
I = 3a + 15

L = 2 x (7 + 3b)
L = 14 + 6b

2)
A = 6 x b + 6 x d
A = 6 x (b + d)
A = 6 (b + d)

B = 3 x 4 + g x 4
B = 4 x (3 + g)
B = 4 (3 + g)

C = p x 8 - p x a
C = p x (8 - a)
C = p (8 - a)

D = s x 7 - 4 x 7
D = 7 x (s - 4)
D = 7 (s - 4)