Réponse :
Explications étape par étape
Bonjour
A=5/4x(7/13+-11/6)
A = 5/4 x (42/78 - 143/78)
A = 5/4 x (-101/78)
A = -505/312
B=3/8x(1/13+3/10)
B = 3/8 x (10/130 + 39/130)
B = 3/8 x 49/130
B = 147/1040
C=-32/7- -4/49x21/8
C = -32/7 + 4/8 x 21/49
C = -32/7 + 1/2 x 3/7
C = -32/7 + 3/14
C = -64/14 + 3/14
C = -61/14
D=-39/-4 + -39/64 x 65/48
D = 39/4 - 39/48 x 65/64
D = 39/4 - 13/16 x 65/64
D = 39/4 - 845/1024
D = 9984/1024 - 845/1024
D = 9139/1024
