Salut, voici la réponse de ton exo !
Réponse : d) -11/10 e) 6/15
Explications étape par étape :
d) 6/5 X (16/9 X 6/32 - 15/12)
= 6/5 X (2 X 8 X 2 X 3 / 3 X 3 X 8 X 4 - 15/12)
=6/5 X (2 X 2 / 3 X 4 - 15/12 )
= 6/5 X ( 4/12 -15/12)
= 6/5 X -11/12
= 6 X -11 /5 X2 X 6
= -11/10
e) (5/2 - 6/25 X 15/12 ) X 6/22 - 3/15
= ( 5/2 - 6 X 5 X 3 / 5 X 5 X 6 X2 ) X 6/22 - 3/15
= ( 5/2 - 3/10 ) X 6/22 - 3/15
= ( 5 X 5 / 2 X5 - 3/10 ) X 6/22 - 3/15
= ( 25/10 - 3/10 ) X 6/22 - 3/15
= 22/10 X 6/22 - 3/15
= 22 X 2 X 3 / 2 X 5 X 22 - 3/15
= 3/5 - 3/15
= 3 X 3 / 5 X 3 - 3/15
= 9/15 - 3/15
= 6/15