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D( x )
2*x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
(x+1)/(2*x) = 12*x // - 12*x
(x+1)/(2*x)-(12*x) = 0
(x+1)/(2*x)-12*x = 0
(x+1)/(2*x)+(-12*2*x*x)/(2*x) = 0
x-12*2*x*x+1 = 0
x-24*x^2+1 = 0
x-24*x^2+1 = 0
x-24*x^2+1 = 0
DELTA = 1^2-(-24*1*4)
DELTA = 97
DELTA > 0
x = (97^(1/2)-1)/(-24*2) or x = (-97^(1/2)-1)/(-24*2)
x = (97^(1/2)-1)/(-48) or x = (97^(1/2)+1)/48
(x-((97^(1/2)-1)/(-48)))*(x-((97^(1/2)+1)/48)) = 0
((x-((97^(1/2)-1)/(-48)))*(x-((97^(1/2)+1)/48)))/(2*x) = 0
((x-((97^(1/2)-1)/(-48)))*(x-((97^(1/2)+1)/48)))/(2*x) = 0 // * 2*x
(x-((97^(1/2)-1)/(-48)))*(x-((97^(1/2)+1)/48)) = 0
( x-((97^(1/2)+1)/48) )
x-((97^(1/2)+1)/48) = 0 // + (97^(1/2)+1)/48
x = (97^(1/2)+1)/48
( x-((97^(1/2)-1)/(-48)) )
x-((97^(1/2)-1)/(-48)) = 0 // + (97^(1/2)-1)/(-48)
x = (97^(1/2)-1)/(-48)
x in { (97^(1/2)+1)/48, (97^(1/2)-1)/(-48) }
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