x^-2=1/49

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Solution for x^-2=1/49 equation: 


D( x )

x = 0

x = 0

x = 0

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

x^-2 = 1/49 // - 1/49

x^-2-(1/49) = 0

x^-2-1/49 = 0

1*x^-2 = 1/49 // : 1

x^-2 = 1/49

-2 < 0

1/(x^2) = 1/49 // * x^2

1 = 1/49*x^2 // : 1/49

49 = x^2

x^2 = 49 // ^ 1/2

abs(x) = 7

x = 7 or x = -7

x in { 7, -7 }

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