Réponses

2013-04-01T16:39:25+02:00
3) (x+2)'' - x(x+1)
= x´´ + 2x + 2x + 4 - (x´´+x)
= x´´ + 4x +4x - x´´ + x
= 5x + 4

(2x +1)(x-3) + (-0,5x´´ -3)4
= 2x´´ -6x + x - 3 + (-2x´´ - 12)
= - 5x - 15