2/(x^2)=9.8

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Solution for 2/(x^2)=9.8 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^2) = 9.8 // - 9.8

2/(x^2)-9.8 = 0

2*x^-2 = 9.8 // : 2

x^-2 = 4.9

-2 < 0

1/(x^2) = 4.9 // * x^2

1 = 4.9*x^2 // : 4.9

0.20408163 = x^2

x^2 = 0.20408163 // ^ 1/2

abs(x) = 0.20408163^(1/2)

x = 0.20408163^(1/2) or x = -0.20408163^(1/2)

x in { 0.20408163^(1/2), -0.20408163^(1/2) }

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