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x in (-oo:+oo)
((x-6)^2)/3-5 = 0
((x-6)^2)/3+(-5*3)/3 = 0
(x-6)^2-5*3 = 0
x^2-12*x+21 = 0
x^2-12*x+21 = 0
x^2-12*x+21 = 0
DELTA = (-12)^2-(1*4*21)
DELTA = 60
DELTA > 0
x = (60^(1/2)+12)/(1*2) or x = (12-60^(1/2))/(1*2)
x = (2*15^(1/2)+12)/2 or x = (12-2*15^(1/2))/2
(x-((12-2*15^(1/2))/2))*(x-((2*15^(1/2)+12)/2)) = 0
((x-((12-2*15^(1/2))/2))*(x-((2*15^(1/2)+12)/2)))/3 = 0
((x-((12-2*15^(1/2))/2))*(x-((2*15^(1/2)+12)/2)))/3 = 0 // * 3
(x-((12-2*15^(1/2))/2))*(x-((2*15^(1/2)+12)/2)) = 0
( x-((12-2*15^(1/2))/2) )
x-((12-2*15^(1/2))/2) = 0 // + (12-2*15^(1/2))/2
x = (12-2*15^(1/2))/2
( x-((2*15^(1/2)+12)/2) )
x-((2*15^(1/2)+12)/2) = 0 // + (2*15^(1/2)+12)/2
x = (2*15^(1/2)+12)/2
x in { (12-2*15^(1/2))/2, (2*15^(1/2)+12)/2 }
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