(-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^2 = 1 // ^ 1/2

abs(x) = 1

x = 1 or x = -1

x in (-oo:-1) U (-1:1) U (1:+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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