Bjr je suis bloquer a cette exercice merci . Exercice 1 : Simplifier les expressions suivantes. A= 11 - (7 - b ) + (4 + a ) + 6 + ( b - 3 ) B= 15 - (10-(6-b)+(

Bonjour,

A= 11 - (7 - b ) + (4 + a ) + 6 + ( b - 3 )
A = 11 - 7 + b + 4 + a + 6 + b - 3
A = a + b + b + 11 + 4 + 6 - 7 - 3
A = a + 2b + 21 - 10
A = a + 2b + 11

B= 15 - (10-(6-b)+(5+4a)
B = 15 - (10 - 6 + b ) + 5 + 4a
B = 15 - 10 + 6 - b + 5 + 4a
B = 4a - b + 15 - 10 + 6 + 5
B = 4a - b - 10 + 26
B = 4a - b + 16

C= -(c + 7) + (8 - b)
C = - c - 7 + 8 - b
C = - b - c + 1

D= (3 - b) + (b + 8)
D = 3 - b + b + 8
D = 11

Bonjour

A = 11 - (7 - b ) + (4 + a ) + 6 + ( b - 3 )
A = 11 - 7 + b + 4 + a + 6 + b - 3
A = a + b + b + 11 + 4 - 7 - 3
A = a + 2b + 11

B = 15 - (10-(6-b)+(5+4a)
B = 15 - ( 10 - 6 + b) + 5 + 4a
B = 15 - 10 + 6 - b + 5 + 4a
B = 4a - b + 16

C = - (c + 7) + (8 - b)
C = - c - 7 + 8 - b
C = - b - c + 1

D = (3 - b) + (b + 8)
D = 3 - b + b + 8
D = 11

Voilà ^^