2x^(-2)=1/8

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Solution for 2x^(-2)=1/8 equation: 


D( x )

x = 0

x = 0

x = 0

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

2*x^-2 = 1/8 // - 1/8

2*x^-2-(1/8) = 0

2*x^-2-1/8 = 0

2*x^-2 = 1/8 // : 2

x^-2 = 1/16

-2 < 0

1/(x^2) = 1/16 // * x^2

1 = 1/16*x^2 // : 1/16

16 = x^2

x^2 = 16 // ^ 1/2

abs(x) = 4

x = 4 or x = -4

x in { 4, -4 }

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