Bonjour,
Calculer:
A= [ (3x5 + 3x2)/ (2x5) ] [ (5x3 - 4x4)/ (4x3) ]= [ (15+6)/10 ] [(15-16)/(12 ]
= (21/10)(-1/12)= (7/10)(-1/4)= -7/40
B= 3/2 + 3/5 x 5/4 -3= 3/2 +3(1/4)-4/3= 3/2+3/4-4/3= (3x6+3x3 -4x4)/12
= (18+9-16)/12= 11/12
