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x in (-oo:+oo)
0 = (-1/12)*(x^2-(24*x)-48) // - (-1/12)*(x^2-(24*x)-48)
0-((-1/12)*(x^2-(24*x)-48)) = 0
(1/12)*(x^2-24*x-48) = 0
1/12*(x^2-24*x-48) = 0
x^2-24*x-48 = 0
x^2-24*x-48 = 0
DELTA = (-24)^2-(-48*1*4)
DELTA = 768
DELTA > 0
x = (768^(1/2)+24)/(1*2) or x = (24-768^(1/2))/(1*2)
x = (16*3^(1/2)+24)/2 or x = (24-16*3^(1/2))/2
(x-((24-16*3^(1/2))/2))*(x-((16*3^(1/2)+24)/2)) = 0
1/12*(x-((24-16*3^(1/2))/2))*(x-((16*3^(1/2)+24)/2)) = 0
( x-((16*3^(1/2)+24)/2) )
x-((16*3^(1/2)+24)/2) = 0 // + (16*3^(1/2)+24)/2
x = (16*3^(1/2)+24)/2
( x-((24-16*3^(1/2))/2) )
x-((24-16*3^(1/2))/2) = 0 // + (24-16*3^(1/2))/2
x = (24-16*3^(1/2))/2
x in { (16*3^(1/2)+24)/2, (24-16*3^(1/2))/2 }
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