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(2*x^2-(3*x))/5-3 = 0
(2*x^2-3*x)/5-3 = 0
(2*x^2-3*x)/5+(-3*5)/5 = 0
2*x^2-3*x-3*5 = 0
2*x^2-3*x-15 = 0
2*x^2-3*x-15 = 0
2*x^2-3*x-15 = 0
DELTA = (-3)^2-(-15*2*4)
DELTA = 129
DELTA > 0
x = (129^(1/2)+3)/(2*2) or x = (3-129^(1/2))/(2*2)
x = (129^(1/2)+3)/4 or x = (3-129^(1/2))/4
(x-((3-129^(1/2))/4))*(x-((129^(1/2)+3)/4)) = 0
((x-((3-129^(1/2))/4))*(x-((129^(1/2)+3)/4)))/5 = 0
((x-((3-129^(1/2))/4))*(x-((129^(1/2)+3)/4)))/5 = 0 // * 5
(x-((3-129^(1/2))/4))*(x-((129^(1/2)+3)/4)) = 0
( x-((129^(1/2)+3)/4) )
x-((129^(1/2)+3)/4) = 0 // + (129^(1/2)+3)/4
x = (129^(1/2)+3)/4
( x-((3-129^(1/2))/4) )
x-((3-129^(1/2))/4) = 0 // + (3-129^(1/2))/4
x = (3-129^(1/2))/4
x in { (129^(1/2)+3)/4, (3-129^(1/2))/4 }
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