Réponses

2013-10-21T21:21:35+02:00
√(9 x^{2}+12x+4)=3

9x²+12x+4=9 -> 9x²+12x-5=0

delta = b²-4ac = 144-(4*9*-5) = 324

x1 = -12-racine(324)/2/9 = -13
x2 = -12+racine(324)/2/9 = -11