Réponses

2014-02-04T22:48:52+01:00
(x-3)*(x+2)+6- x² 
a) si x = -5
(-5-3) * (-5+2) - (-5)²
= -8 * ( -3) - 25
= 24-25 = -1
b) si x = 4
(4-3)*(4+2)- 4²
= 1 * 6 - 16
= 6-16 =-10