Réponse :
Explications étape par étape
Bonjour
x^2 = -3x - 2
x^2 + 3x + 2 = 0
[tex]\Delta = 3^{2} - 4 * 1 * 2 = 9 - 8 = 1[/tex]
X1 = (-3-1)/2 = -4/2 = -2
X2 = (-3+1)/2 = -2/2 = -1
1/(x - 6) = -1
1 = -(x - 6)
1 = -x + 6
x = 6 - 1
x = 5
(2x + 1)/(x^2 + 1) = 0
x^2 + 1 toujours > 0
2x + 1 = 0
2x = -1
x = -1/2
