1/x^2-0.25=0

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Solution for 1/x^2-0.25=0 equation: 


D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in (-oo:0) U (0:+oo)

1/(x^2)-0.25 = 0

1*x^-2 = 0.25 // : 1

x^-2 = 0.25

-2 < 0

1/(x^2) = 0.25 // * x^2

1 = 0.25*x^2 // : 0.25

4 = x^2

x^2 = 4 // ^ 1/2

abs(x) = 2

x = 2 or x = -2

x in { 2, -2 }

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