0.57/0.22=1.2/x^2

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Solution for 0.57/0.22=1.2/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)

0.57/0.22 = 1.2/(x^2) // - 1.2/(x^2)

0.57/0.22-(1.2/(x^2)) = 0

0.57/0.22-1.2*x^-2 = 0

-1.2*x^-2 = -2.59090909 // : -1.2

x^-2 = 2.15909091

-2 < 0

1/(x^2) = 2.15909091 // * x^2

1 = 2.15909091*x^2 // : 2.15909091

0.46315789 = x^2

x^2 = 0.46315789 // ^ 1/2

abs(x) = 0.46315789^(1/2)

x = 0.46315789^(1/2) or x = -0.46315789^(1/2)

x in { 0.46315789^(1/2), -0.46315789^(1/2) }

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