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6*x-x^2-((24/16)*x) = 0
6*x-x^2+(-3/2)*x = 0
9/2*x-x^2 = 0
DELTA = (9/2)^2-(-1*0*4)
DELTA = 81/4
DELTA > 0
x = ((81/4)^(1/2)-9/2)/(-1*2) or x = (-(81/4)^(1/2)-9/2)/(-1*2)
x = 0 or x = 9/2
x in { 0, 9/2 }
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