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D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
(3*(y^2-64))/y-8 = 0
(3*(y^2-64))/y+(-8*y)/y = 0
3*(y^2-64)-8*y = 0
3*y^2-8*y-192 = 0
3*y^2-8*y-192 = 0
3*y^2-8*y-192 = 0
DELTA = (-8)^2-(-192*3*4)
DELTA = 2368
DELTA > 0
y = (2368^(1/2)+8)/(2*3) or y = (8-2368^(1/2))/(2*3)
y = (8*37^(1/2)+8)/6 or y = (8-8*37^(1/2))/6
(y-((8-8*37^(1/2))/6))*(y-((8*37^(1/2)+8)/6)) = 0
((y-((8-8*37^(1/2))/6))*(y-((8*37^(1/2)+8)/6)))/y = 0
((y-((8-8*37^(1/2))/6))*(y-((8*37^(1/2)+8)/6)))/y = 0 // * y
(y-((8-8*37^(1/2))/6))*(y-((8*37^(1/2)+8)/6)) = 0
( y-((8*37^(1/2)+8)/6) )
y-((8*37^(1/2)+8)/6) = 0 // + (8*37^(1/2)+8)/6
y = (8*37^(1/2)+8)/6
( y-((8-8*37^(1/2))/6) )
y-((8-8*37^(1/2))/6) = 0 // + (8-8*37^(1/2))/6
y = (8-8*37^(1/2))/6
y in { (8*37^(1/2)+8)/6, (8-8*37^(1/2))/6 }
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