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