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x in (-oo:+oo)
x^2-(2/25) = 14/25 // - 14/25
x^2-(2/25)-(14/25) = 0
x^2-2/25-14/25 = 0
1*x^2 = 16/25 // : 1
x^2 = 16/25
x^2 = 16/25 // ^ 1/2
abs(x) = 4/5
x = 4/5 or x = -4/5
x in { 4/5, -4/5 }
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