A=8/3

B= -5/3

C=4/3

D= -11/3

Bonne soirée à toi :)

Salut,

A = x + 2

A = 2/3 + 2

A = 2/3 + 6/3

A = 8/3

B = 2x - 3

B = 2*(2/3) - 3

B = 4/3 - 9/3

B = - 5/3

C = 4(1-x)

C = 4( 1 - 2/3)

C = 4 (3/3 - 2/3)

C = 4* 1/3

C = 4/3

x² - 4x + 1

= (2/3) ² - 4*(2/3) + 1

= 4/9 - 8/3 + 1

= 4/9 - 24/9 + 9/9

= -11/9

J'espère t'avoir aidé !

Dreamus