(-2x^2-2)/(x^2+1)^2

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Solution for (-2x^2-2)/(x^2+1)^2 equation: 


D( x )

(x^2+1)^2 = 0

(x^2+1)^2 = 0

(x^2+1)^2 = 0

1*x^2 = -1 // : 1

x^2 = -1

x in (-oo:+oo)

(-2*x^2-2)/((x^2+1)^2) = 0

-2*x^2 = 2 // : -2

x^2 = -1

x belongs to the empty set

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