Sagot :
A= [tex]\frac{-2*7*2}{7*3*5}[/tex] - 8/5
A= [tex]\frac{-2*2}{5*3} - \frac{8*3}{5*3}[/tex]
A= [tex]\frac{-4}{15} - \frac{24}{15}[/tex]
A= 20/15
A= [tex]\frac{4*5}{3*5}[/tex]
A= 4/3
B= [tex]\frac{1}{4} + \frac{5*-1}{3*8}[/tex]
B= 1/4 - 5/24
B= 1*6/4*6 - 5/24
B= 6/24 -5/24
B= 1/24
C= 4/-3 + -7*-2/6*5
C= -4/3 + 14/30
C= -4*10/3*10 + 14/30
C= -40/30 + 14/30
C= -26/30
C= -13/15
D= (8/5 - 7/5) * (-1/6 + 2/9)
D= 1/5 * (-1*3/6*3 + 2*2/9*2)
D= 1/5 * (-3/18 + 4/18)
D= 1/5 * 1/18
D= 1*1/5*18
D= 1/90