X^2-(1/81)

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Solution for X^2-(1/81) equation: 


X in (-oo:+oo)

X^2-(1/81) = 0

X^2-1/81 = 0

1*X^2 = 1/81 // : 1

X^2 = 1/81

X^2 = 1/81 // ^ 1/2

abs(X) = 1/9

X = 1/9 or X = -1/9

X in { 1/9, -1/9 }

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