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(5/2)*x^2+3*x+1/10 = 0
5/2*x^2+3*x+1/10 = 0
DELTA = 3^2-(1/10*5/2*4)
DELTA = 8
DELTA > 0
x = (8^(1/2)-3)/(2*5/2) or x = (-8^(1/2)-3)/(2*5/2)
x = (2*2^(1/2)-3)/5 or x = (-2*2^(1/2)-3)/5
x in { (-2*2^(1/2)-3)/5, (2*2^(1/2)-3)/5 }
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