2x=21.6/x^2

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Solution for 2x=21.6/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*x = 21.6/(x^2) // - 21.6/(x^2)

2*x-(21.6/(x^2)) = 0

2*x-21.6*x^-2 = 0

2*x-21.6*x^-2 = 0

x*(2-21.6*x^-3) = 0

-21.6*x^-3 = -2 // : -21.6

x^-3 = 0.09259259

-3 < 0

1/(x^3) = 0.09259259 // * x^3

1 = 0.09259259*x^3 // : 0.09259259

10.8000003 = x^3

x^3 = 10.8000003 // ^ 1/3

x = 10.8000003^(1/3)

x = 0

x = 0

x in { 0} 

x = 10.8000003^(1/3)

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