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x in (-oo:+oo)
100 = 0.4*((5*x)/0.12)*(1-x) // - 0.4*((5*x)/0.12)*(1-x)
100-(0.4*((5*x)/0.12)*(1-x)) = 0
100-16.66666667*x*(1-x) = 0
100-16.66666667*x*(1-x) = 0
16.66666667*x^2-16.66666667*x+100 = 0
16.66666667*x^2-16.66666667*x+100 = 0
16.66666667*x^2-16.66666667*x+100 = 0
DELTA = (-16.66666667)^2-(4*16.66666667*100)
DELTA = 16.66666667^2-6666.666668
DELTA = -6388.88889011
DELTA < 0
1 = 0
1 = 0
x belongs to the empty set
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