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Sagot :

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

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