8/x^2-2x

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Solution for 8/x^2-2x 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)

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

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

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

2*x*(4*x^-3-1) = 0

4*x^-3 = 1 // : 4

x^-3 = 1/4

-3 < 0

1/(x^3) = 1/4 // * x^3

1 = 1/4*x^3 // : 1/4

4 = x^3

x^3 = 4 // ^ 1/3

x = 4^(1/3)

2*x = 0

2*x = 0 // : 2

x = 0

x in { 0} 

x = 4^(1/3)

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