1/5*(-3/2)au carré =? 12*(-5/6)au carré -(-4/9) = (2/3-8*1/6)(1-7/3)= (5/6-2)au carré = 4/3-1/3*5= (5/6+1/3):2/9= 4/3:(2-9/4)= Merci !

1/5 * (- 3/2)²
= 1/5 * 9/4
= 9/20

(2/3 - 8 * 1/6)(1 - 7/3)
= (2/3 - 8/6)(3/3 - 7/3)
= - 4/6 * (- 4/3)
= 16/18
= 8/9

(5/6 - 2)²
= (5/6 - 12/6)²
= (- 7/6)²
= 49/36

4/3 - 1/3 * 5
= 4/3 - 5/3
= - 1/3

(5/6 + 1/3) : 2/9
= (5/6 + 2/6) x 9/2
= 7/6 x 9/2
= 63/12

4/3 : (2 - 9/4)
= 4/3 : (8/4 - 9/4)
= 3/4 x (- 1/4)
= - 3/16