x^-2=4/25

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Solution for x^-2=4/25 equation: 


D( x )

x = 0

x = 0

x = 0

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

x^-2 = 4/25 // - 4/25

x^-2-(4/25) = 0

x^-2-4/25 = 0

1*x^-2 = 4/25 // : 1

x^-2 = 4/25

-2 < 0

1/(x^2) = 4/25 // * x^2

1 = 4/25*x^2 // : 4/25

25/4 = x^2

x^2 = 25/4 // ^ 1/2

abs(x) = 5/2

x = 5/2 or x = -5/2

x in { 5/2, -5/2 }

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