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y in (-oo:+oo)
((2*y-3)^2)/3 = (3*y)^(1^3) // - (3*y)^(1^3)
((2*y-3)^2)/3-(3*y)^(1^3) = 0
((2*y-3)^2)/3-3*y = 0
((2*y-3)^2)/3+(-3*3*y)/3 = 0
(2*y-3)^2-3*3*y = 0
4*y^2-21*y+9 = 0
4*y^2-21*y+9 = 0
4*y^2-21*y+9 = 0
DELTA = (-21)^2-(4*4*9)
DELTA = 297
DELTA > 0
y = (297^(1/2)+21)/(2*4) or y = (21-297^(1/2))/(2*4)
y = (3*33^(1/2)+21)/8 or y = (21-3*33^(1/2))/8
(y-((21-3*33^(1/2))/8))*(y-((3*33^(1/2)+21)/8)) = 0
((y-((21-3*33^(1/2))/8))*(y-((3*33^(1/2)+21)/8)))/3 = 0
((y-((21-3*33^(1/2))/8))*(y-((3*33^(1/2)+21)/8)))/3 = 0 // * 3
(y-((21-3*33^(1/2))/8))*(y-((3*33^(1/2)+21)/8)) = 0
( y-((21-3*33^(1/2))/8) )
y-((21-3*33^(1/2))/8) = 0 // + (21-3*33^(1/2))/8
y = (21-3*33^(1/2))/8
( y-((3*33^(1/2)+21)/8) )
y-((3*33^(1/2)+21)/8) = 0 // + (3*33^(1/2)+21)/8
y = (3*33^(1/2)+21)/8
y in { (21-3*33^(1/2))/8, (3*33^(1/2)+21)/8 }
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