Je ne suis pas sure de mes calcules n'hésite pas à les refaire:
A= (3/2)*7-5 B=-3*(1/3)²+(1/3) C=(9/4)/(3/2)-(1/2)
(3/2)*(7/1)-(5/1) (-3/1)*(1/9)+(1/3) ((9/3)/(4/2))-(1/2)
(3*7/2*1)-(5/1) (-3*1/1*9)+(1/3) (3/2)-(1/2)
(21/2)-(5/1) (-3/9)+(1/3) (2/2)
(21/2)-(5*2/1*2) (-3/9)+(1*3/3*3)
(21/2)-(10/2) (-3/9)+(3/9)
(11/2) (0/9)
D=(2/3)²-2 E=(1-(1/2))²
(4/9)-(2/1) 1²-2*1*(1/2)+(1/2)²
(4/9)-(2*9/1*9) 1-(2/2)+(1/4)
(4/9)-(18/9) (4/4)-(2*2/2*2)+(1/4)
(-14/9) (4/4)-(4/4)+(1/4)
(1/4)
Si tu as des questions n'hésite pas.