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((5*x)/2)*x+3*x-((8/2)*x)-3-3 = 0
((5*x)/2)*x+3*x-4*x-3-3 = 0
5/2*x^2-x-6 = 0
DELTA = (-1)^2-(-6*5/2*4)
DELTA = 61
DELTA > 0
x = (61^(1/2)+1)/(2*5/2) or x = (1-61^(1/2))/(2*5/2)
x = (61^(1/2)+1)/5 or x = (1-61^(1/2))/5
x in { (1-61^(1/2))/5, (61^(1/2)+1)/5 }
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