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x in (-oo:+oo)
37.33 = (3/4)*x*x // - (3/4)*x*x
37.33-((3/4)*x*x) = 0
(-3/4)*x^2+37.33 = 0
-3/4*x^2 = -37.33 // : -3/4
x^2 = 49.77333333
x^2 = 49.77333333 // ^ 1/2
abs(x) = 49.77333333^(1/2)
x = 49.77333333^(1/2) or x = -49.77333333^(1/2)
x in { 49.77333333^(1/2), -49.77333333^(1/2) }
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