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x in (-oo:+oo)
(x*x)/100 = 83.25 // - 83.25
(x*x)/100-83.25 = 0
1/100*x^2 = 83.25 // : 1/100
x^2 = 8325
x^2 = 8325 // ^ 1/2
abs(x) = 15*37^(1/2)
x = 15*37^(1/2) or x = -(15*37^(1/2))
x in { 15*37^(1/2), -(15*37^(1/2)) }
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