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x in (-oo:+oo)
x^2 = 1/64 // - 1/64
x^2-(1/64) = 0
x^2-1/64 = 0
1*x^2 = 1/64 // : 1
x^2 = 1/64
x^2 = 1/64 // ^ 1/2
abs(x) = 1/8
x = 1/8 or x = -1/8
x in { 1/8, -1/8 }
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