Calcule:
A= [ (3x5+3x2)/(2x5) ] [ (5x3- 4x4)/(4x3) ]= (21/10)(-1/12)= (7/10)(-1/4)= -7/40.
B= [ (4x2-5x3)/(3x2) ] / [ (-2x4+3x3)/(3x4) ]= (-7/6)/(1/12)= -7/6 (12)= -7(2)= - 14
C= (3/2)+ 3(1/4)-4/3= (3x6+3x3-4x4)/12= 11/12.
D= 4/3+(5/2)(3/2)+3/4= 4/3+18/4= 4/3+9/2= (4x2+9x3)/(3x2)= 35/6 .