Bonjour
exercice 58 :
décomposer en produit de nombres premiers et simplifier :
50/15 = (5 x 10)/(5 x 3)
50/15 = (5 x 2 x 5)/(5 x 3)
50/15 = 10/3
39/15 = (3 x 13)/(3 x 5)
39/15 = 13/5
-98/35 = (-7 x 14)/(7 x 5)
-98/35 = (-7 x 2 x 7)/(7 x 5)
-98/35 = -14/5
78/135 = (3 x 26)/(3 x 45)
78/135 = (3 x 2 x 13)/(3 x 3 x 3 x 5)
78/135 = 26/45
99/-165 = -(9 x 11)/(5 x 33)
99/-165 = -(3 x 3 x 11)/(5 x 3 x 11)
99/-165 = -3/5
