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x in (-oo:+oo)
((x+9)^2)/3 = 125 // - 125
((x+9)^2)/3-125 = 0
((x+9)^2)/3+(-125*3)/3 = 0
(x+9)^2-125*3 = 0
x^2+18*x-294 = 0
x^2+18*x-294 = 0
x^2+18*x-294 = 0
DELTA = 18^2-(-294*1*4)
DELTA = 1500
DELTA > 0
x = (1500^(1/2)-18)/(1*2) or x = (-1500^(1/2)-18)/(1*2)
x = (10*15^(1/2)-18)/2 or x = (-10*15^(1/2)-18)/2
(x-((-10*15^(1/2)-18)/2))*(x-((10*15^(1/2)-18)/2)) = 0
((x-((-10*15^(1/2)-18)/2))*(x-((10*15^(1/2)-18)/2)))/3 = 0
((x-((-10*15^(1/2)-18)/2))*(x-((10*15^(1/2)-18)/2)))/3 = 0 // * 3
(x-((-10*15^(1/2)-18)/2))*(x-((10*15^(1/2)-18)/2)) = 0
( x-((-10*15^(1/2)-18)/2) )
x-((-10*15^(1/2)-18)/2) = 0 // + (-10*15^(1/2)-18)/2
x = (-10*15^(1/2)-18)/2
( x-((10*15^(1/2)-18)/2) )
x-((10*15^(1/2)-18)/2) = 0 // + (10*15^(1/2)-18)/2
x = (10*15^(1/2)-18)/2
x in { (-10*15^(1/2)-18)/2, (10*15^(1/2)-18)/2 }
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