Réponses

2014-02-01T15:25:01+01:00
Bonjour

K= -11/-28 :  -77/-63 
= -11/-28 x -63/-77 = 693/2156 = 9/28


   L= -6/-15 : -8/-20   = -6/ -15 x -20/ -8 = 120/ 120 = 1