(9/x^2)-25=0

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Solution for (9/x^2)-25=0 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)

9/(x^2)-25 = 0

9*x^-2 = 25 // : 9

x^-2 = 25/9

-2 < 0

1/(x^2) = 25/9 // * x^2

1 = 25/9*x^2 // : 25/9

9/25 = x^2

x^2 = 9/25 // ^ 1/2

abs(x) = 3/5

x = 3/5 or x = -3/5

x in { 3/5, -3/5 }

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