Réponses

2014-01-12T20:35:42+01:00
A = 5-(3x+2)+3x(x-5)
=5-3x-2-3x²-15x
=-3x²-18x+3

Calculer l'expression A = x= -2 
-3(-2)²-18(-2)+3
=-3*4+36+3
=-12+36+3
=27
2014-01-12T20:39:32+01:00