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D( x )
x-6 = 0
x = 0
x-6 = 0
x-6 = 0
x-6 = 0 // + 6
x = 6
x = 0
x = 0
x in (-oo:0) U (0:6) U (6:+oo)
(x*((((3*x)/(x-6))*(x+6))/4))/x+6 = 0
(3*x*(x+6))/(4*(x-6))+6 = 0
(3*x*(x+6))/(4*(x-6))+(4*6*(x-6))/(4*(x-6)) = 0
3*x*(x+6)+4*6*(x-6) = 0
3*x^2+42*x-144 = 0
3*x^2+42*x-144 = 0
3*(x^2+14*x-48) = 0
x^2+14*x-48 = 0
DELTA = 14^2-(-48*1*4)
DELTA = 388
DELTA > 0
x = (388^(1/2)-14)/(1*2) or x = (-388^(1/2)-14)/(1*2)
x = (2*97^(1/2)-14)/2 or x = (-2*97^(1/2)-14)/2
3*(x-((-2*97^(1/2)-14)/2))*(x-((2*97^(1/2)-14)/2)) = 0
(3*(x-((-2*97^(1/2)-14)/2))*(x-((2*97^(1/2)-14)/2)))/(4*(x-6)) = 0
(3*(x-((-2*97^(1/2)-14)/2))*(x-((2*97^(1/2)-14)/2)))/(4*(x-6)) = 0 // * 4*(x-6)
3*(x-((-2*97^(1/2)-14)/2))*(x-((2*97^(1/2)-14)/2)) = 0
( x-((-2*97^(1/2)-14)/2) )
x-((-2*97^(1/2)-14)/2) = 0 // + (-2*97^(1/2)-14)/2
x = (-2*97^(1/2)-14)/2
( x-((2*97^(1/2)-14)/2) )
x-((2*97^(1/2)-14)/2) = 0 // + (2*97^(1/2)-14)/2
x = (2*97^(1/2)-14)/2
x in { (-2*97^(1/2)-14)/2, (2*97^(1/2)-14)/2 }
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