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D( x )
x^3+5*x^2-(6*x) = 0
x^3+5*x^2-(6*x) = 0
x^3+5*x^2-(6*x) = 0
x^3+5*x^2-6*x = 0
x^3+5*x^2-6*x = 0
x*(x^2+5*x-6) = 0
x^2+5*x-6 = 0
DELTA = 5^2-(-6*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-5)/(1*2) or x = (-49^(1/2)-5)/(1*2)
x = 1 or x = -6
x = 0
x = 0
x in (-oo:-6) U (-6:0) U (0:1) U (1:+oo)
(3-(6*x))/(x^3+5*x^2-(6*x)) = 0
(3-6*x)/(x^3+5*x^2-6*x) = 0
x^3+5*x^2-6*x = 0
x*(x^2+5*x-6) = 0
x^2+5*x-6 = 0
DELTA = 5^2-(-6*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-5)/(1*2) or x = (-49^(1/2)-5)/(1*2)
x = 1 or x = -6
x*(x+6)*(x-1) = 0
(3-6*x)/(x*(x+6)*(x-1)) = 0
3-6*x = 0 // - 3
-6*x = -3 // : -6
x = -3/(-6)
x = 1/2
x = 1/2
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