Svp aidez moi c’est un dm de maths de seconde

Réponse :

Explications étape par étape

Bonsoir

-5/2 x 7/3

= (-5 x 7)/(2 x 3)

= -35/6

-13/3 x 2/5 x -7/15

= (-13 x 2 x -7)/(3 x 5 x 15)

= 182/225

7/20 x -70/3

= (7 x -70)/(20 x 3)

= (-7 x 7 x 10)/(2 x 10 x 3)

= -49/6

9/7 x -7/5 x 2/27

= (9 x -7 x 2)/(7 x 5 x 27)

= (-9 x 7 x 2)/(7 x 5 x 3 x 9)

= (-63 x 2)/(63 x 15)

= -2/15

- 4 x 3/4 x 7/6

= (-4 x 3 x 7)/(4 x 6)

= (-4 x 3 x 7)/(4 x 3 x 2)

= -7/2