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x in (-oo:+oo)
((x+3)^2)/3 = 8 // - 8
((x+3)^2)/3-8 = 0
((x+3)^2)/3+(-8*3)/3 = 0
(x+3)^2-8*3 = 0
x^2+6*x-15 = 0
x^2+6*x-15 = 0
x^2+6*x-15 = 0
DELTA = 6^2-(-15*1*4)
DELTA = 96
DELTA > 0
x = (96^(1/2)-6)/(1*2) or x = (-96^(1/2)-6)/(1*2)
x = (4*6^(1/2)-6)/2 or x = (-4*6^(1/2)-6)/2
(x-((-4*6^(1/2)-6)/2))*(x-((4*6^(1/2)-6)/2)) = 0
((x-((-4*6^(1/2)-6)/2))*(x-((4*6^(1/2)-6)/2)))/3 = 0
((x-((-4*6^(1/2)-6)/2))*(x-((4*6^(1/2)-6)/2)))/3 = 0 // * 3
(x-((-4*6^(1/2)-6)/2))*(x-((4*6^(1/2)-6)/2)) = 0
( x-((-4*6^(1/2)-6)/2) )
x-((-4*6^(1/2)-6)/2) = 0 // + (-4*6^(1/2)-6)/2
x = (-4*6^(1/2)-6)/2
( x-((4*6^(1/2)-6)/2) )
x-((4*6^(1/2)-6)/2) = 0 // + (4*6^(1/2)-6)/2
x = (4*6^(1/2)-6)/2
x in { (-4*6^(1/2)-6)/2, (4*6^(1/2)-6)/2 }
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