Bonjour j'ai besoin d'aide, merci à la personne qui m'aidera

bonsoir,

A = 7/3 - 5/7 x 7/9

A = 7/3 - 35/63

A =  147/63  - 35/63 =  112/63 = 16/9

C = ( 1/4 - 1 )²

C = ( 1/4 - 4/4 )²

C = - 3/4 ²

C = 9/16

16/9 x 9/16 =   1

g(x) =[ ( x - 1) / 5 ] - 4

g (1/3) =  [ ( 1/3 - 1)/5] - 4

g (1/3) =  [(1/3 - 3/3)/5 ] - 4

g (1/3) =  [ - 2/3 x 1/5) - 4

g ( 1/3 )  = - 2/15 - 4 = - 2/15 - 60/15 = - 62/15