Réponses

Meilleure réponse !
2014-09-12T18:09:24+02:00
E=(1/9-1/3)²×9/2
=(1/9-3/9)²×9/2
= -2/9²×9/2
=-2/9×-2/9×9/2
=4/81×9/2
=36/162
=36÷18/162÷18
=2/9