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x in (-oo:+oo)
19.06*x-((7.63*x^2)/2) = 0
19.06*x-3.815*x^2 = 0
19.06*x-3.815*x^2 = 0
DELTA = 19.06^2-(-3.815*0*4)
DELTA = 19.06^2
DELTA = 363.2836
DELTA > 0
x = ((19.06^2)^(1/2)-19.06)/(-3.815*2) or x = (-(19.06^2)^(1/2)-19.06)/(-3.815*2)
x = 0 or x = 4.99606815
x in { 0, 4.99606815 }
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