x2=9/81

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Solution for x2=9/81 equation: 


x in (-oo:+oo)

x^2 = 9/81 // - 9/81

x^2-(9/81) = 0

x^2-1/9 = 0

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

x^2 = 1/9

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

abs(x) = 1/3

x = 1/3 or x = -1/3

x in { 1/3, -1/3 }

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