Bonjour je n’y arrive pas pouvez m’aider svp

Oui bien sûr

A=-2/3 - 7/6

A=-2x2/3x2 - 7/6

A= -4/6 - 7/6

A= -4-7/6

A= -11/6

B=-5/2 + 1/3

B = -5x3/2x3 + 1×2/3×2

B = -15/6 + 2/6

B= -15+2/6

B= -13/6

C=-5/9 : 7/2

C= -5/9 × 2/7

C = -5×2/9×7

C = -10/63

D=-7 × (-5/4)

D=-7×(-5)/1×4

D=35/4

E= -2/7 + 5×(-3/5)

E= -2/7 + 5×(-3)/1×5

E = -2/7 + (-15/5)

E= -2×5/7×5 + (-15)×7/5×7

E = -10/35 + (-105)/35

E = -10-105/35

E = -115/35

E = -23/7

F= 2-5/2 / 5/4

F = 2×2/1×2 - 5/2 / 5/4

F = 4/2 - 5/2 / 5/4

F = 4-5/2 / 5/4

F = -1/2 / 5/4

F = -1/2 × 4/5

F= -4/10