Sagot :
Réponse :
a. A=-4/7x5/2
=-4x5 / 7x2
=-20/14
=-10/7
b. B=3/2x7/9
=3x7 / 2x9
=21/18
=7/6
c. C=A+B
= -10/7 + 7/6
= -60/42 + 49/42
= -18/42
Bonne continuation !
Réponse:
- 4 5 = -20 = - 10 3 × 7 = 21 = 7
7 2 14 7 2 9 18 6
- 10 + 7 = -60 + 49 = - 11
7 6 42 42 42