75/x^2=3

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Solution for 75/x^2=3 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)

75/(x^2) = 3 // - 3

75/(x^2)-3 = 0

75*x^-2 = 3 // : 75

x^-2 = 1/25

-2 < 0

1/(x^2) = 1/25 // * x^2

1 = 1/25*x^2 // : 1/25

25 = x^2

x^2 = 25 // ^ 1/2

abs(x) = 5

x = 5 or x = -5

x in { 5, -5 }

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