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D( x )
6*x^2-(36*x) = 0
x^3-(36*x) = 0
6*x^2-(36*x) = 0
6*x^2-(36*x) = 0
6*x^2-36*x = 0
6*x^2-36*x = 0
DELTA = (-36)^2-(0*4*6)
DELTA = 1296
DELTA > 0
x = (1296^(1/2)+36)/(2*6) or x = (36-1296^(1/2))/(2*6)
x = 6 or x = 0
x^3-(36*x) = 0
x^3-(36*x) = 0
x^3-36*x = 0
x^3-36*x = 0
x*(x^2-36) = 0
1*x^2 = 36 // : 1
x^2 = 36
x^2 = 36 // ^ 1/2
abs(x) = 6
x = 6 or x = -6
x = 0
x = 0
x in (-oo:-6) U (-6:0) U (0:6) U (6:+oo)
1/(6*x^2-(36*x))-(3/(x^3-(36*x))) = 0
1/(6*x^2-36*x)-3*(x^3-36*x)^-1 = 0
1/(6*x^2-36*x)-3/(x^3-36*x) = 0
6*x^2-36*x = 0
6*x^2-36*x = 0
6*x*(x-6) = 0
x-6 = 0 // + 6
x = 6
6*x*(x-6) = 0
x^3-36*x = 0
x^3-36*x = 0
x*(x^2-36) = 0
1*x^2 = 36 // : 1
x^2 = 36
x^2 = 36 // ^ 1/2
abs(x) = 6
x = 6 or x = -6
x*(x-6)*(x+6) = 0
1/(6*x*(x-6))-3/(x*(x-6)*(x+6)) = 0
(1*x)/(6*x*x*(x-6))+(-3*6*x)/(6*x*x*(x-6)) = 0
1*x-3*6*x = 0
-17*x = 0
(-17*x)/(6*x*x*(x-6)) = 0
(-17*x)/(6*x*x*(x-6)) = 0 // * 6*x*x*(x-6)
-17*x = 0
-17*x = 0 // : -17
x = 0
x in { 0}
x belongs to the empty set
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