Réponses

2012-09-15T18:38:54+02:00

-4/31 * [(2/3 + 11/6) - (2/12 - 1/3)]

= -4/31 * [(4/6 + 11/6) - (2/12 - 4/12)]

= -4/31 * [(15/6) - (-2/12)]

= -4/31 * [(15/6) + 1/6]

= -4/31 * (16/6)

= -4/31 * 8/3

= - 32 / 93