Bonjour,

1) Développer :

A = 5 (7x - 2)

A = 35x - 10

2) Factoriser :

B = 12ab - 2a + 2

B = 2 (6ab - a + 1)

3) Calculer :

C = 3q - h pour q = 4 et h = - 2

C = 3 x 4 - (- 2)

C = 12 + 2

C = 14

4) Calculer :

D = - 5 + (- 3) - (+ 8) - (5 + 2 x 9)

D = - 5 - 3 - 8 - (5 + 18)

D = - 16 - (23)

D = - 39

5) Calculer :

E = 15/24 x (4/5 + 2/3)

E = 15/24 x [(4 x 3) / (5 x 3) + (2 x 5) / (3 x 5)]

E = 15/24 x (12/15 + 10/15)

E = 15/24 x 22/15

E = 330/360

E = (30 x 11) / (30 x 12)

E = 11/12.

Bonjour,

Développer A:

A= 5(7x-2)

A= 35x-10

Factoriser B:

B= 12ab-2a+2

B= 2(6ab-a+1)

Calculer 3q-h pour q= 4 et h= -2

C= 3(4)-(-2)= 12+2= 14

Calculer D:

D= -5-3-8-(5+18)

D= -5-3-8- 23

D= - 39

Calculer E:

E= 15/24 x( 4x3+2x5)/(5x+3)

E= 15/24 x (22/15) tu barres les 15, il reste

E= 22/24

E=11/12