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