2=392/x^2

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Solution for 2=392/x^2 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)

2 = 392/(x^2) // - 392/(x^2)

2-(392/(x^2)) = 0

2-392*x^-2 = 0

-392*x^-2 = -2 // : -392

x^-2 = 1/196

-2 < 0

1/(x^2) = 1/196 // * x^2

1 = 1/196*x^2 // : 1/196

196 = x^2

x^2 = 196 // ^ 1/2

abs(x) = 14

x = 14 or x = -14

x in { 14, -14 }

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