Réponse :
Explications étape par étape
Bonsoir
Recopier et compléter :
10/-12 = -5 / ... = ... / 30 = 45 / ... = -15 / ...
10/-12 = (2 x 5) / (2 x (-6)) = -5/6
-5/6 = (-5 x 5)/(6 x 5) = -25/30
-5/6 = (-5 x -9)/(6 x (-9)) = 45/-54
-5/6 = (-5 x 3)/(6 x 3) = -15/18
