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D( x )
x*((9*x-3)/9)-9 = 0
x*((9*x-3)/9)-9 = 0
x*((9*x-3)/9)-9 = 0
(x*(9*x-3))/9-9 = 0
(x*(9*x-3))/9+(-9*9)/9 = 0
x*(9*x-3)-9*9 = 0
9*x^2-3*x-81 = 0
9*x^2-3*x-81 = 0
3*(3*x^2-x-27) = 0
3*x^2-x-27 = 0
DELTA = (-1)^2-(-27*3*4)
DELTA = 325
DELTA > 0
x = (325^(1/2)+1)/(2*3) or x = (1-325^(1/2))/(2*3)
x = (5*13^(1/2)+1)/6 or x = (1-5*13^(1/2))/6
3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)) = 0
(3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)))/9 = 0
(3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)))/9 = 0 // * 9
3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)) = 0
( 3 )
3 = 0
x belongs to the empty set
( x-((1-5*13^(1/2))/6) )
x-((1-5*13^(1/2))/6) = 0 // + (1-5*13^(1/2))/6
x = (1-5*13^(1/2))/6
( x-((5*13^(1/2)+1)/6) )
x-((5*13^(1/2)+1)/6) = 0 // + (5*13^(1/2)+1)/6
x = (5*13^(1/2)+1)/6
x in (-oo:(1-5*13^(1/2))/6) U ((1-5*13^(1/2))/6:(5*13^(1/2)+1)/6) U ((5*13^(1/2)+1)/6:+oo)
3/(x*((9*x-3)/9)-9) = 0
3/((x*(9*x-3))/9-9) = 0
(x*(9*x-3))/9-9 = 0
(x*(9*x-3))/9+(-9*9)/9 = 0
x*(9*x-3)-9*9 = 0
9*x^2-3*x-81 = 0
9*x^2-3*x-81 = 0
3*(3*x^2-x-27) = 0
3*x^2-x-27 = 0
DELTA = (-1)^2-(-27*3*4)
DELTA = 325
DELTA > 0
x = (325^(1/2)+1)/(2*3) or x = (1-325^(1/2))/(2*3)
x = (5*13^(1/2)+1)/6 or x = (1-5*13^(1/2))/6
3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)) = 0
(3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)))/9 = 0
(3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)))/9 = 0 // * 9
3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6)) = 0
3/(3*(x-((1-5*13^(1/2))/6))*(x-((5*13^(1/2)+1)/6))) = 0
3 = 0
x belongs to the empty set
x belongs to the empty set
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