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D( x )
(x^2-300)^1 = 0
(x^2-300)^1 = 0
(x^2-300)^1 = 0
x^2-300 = 0
1*x^2 = 300 // : 1
x^2 = 300
x^2 = 300 // ^ 1/2
abs(x) = 10*3^(1/2)
x = 10*3^(1/2) or x = -(10*3^(1/2))
x in (-oo:-(10*3^(1/2))) U (-(10*3^(1/2)):10*3^(1/2)) U (10*3^(1/2):+oo)
2-((x/((x^2-300)^1))/2) = 0
2-((x/(x^2-300))/2) = 0
(-1*x)/(2*(x^2-300))+2 = 0
(-1*x)/(2*(x^2-300))+(2^2*(x^2-300))/(2*(x^2-300)) = 0
2^2*(x^2-300)-1*x = 0
4*x^2-x-1200 = 0
4*x^2-x-1200 = 0
4*x^2-x-1200 = 0
DELTA = (-1)^2-(-1200*4*4)
DELTA = 19201
DELTA > 0
x = (19201^(1/2)+1)/(2*4) or x = (1-19201^(1/2))/(2*4)
x = (19201^(1/2)+1)/8 or x = (1-19201^(1/2))/8
(x-((1-19201^(1/2))/8))*(x-((19201^(1/2)+1)/8)) = 0
((x-((1-19201^(1/2))/8))*(x-((19201^(1/2)+1)/8)))/(2*(x^2-300)) = 0
((x-((1-19201^(1/2))/8))*(x-((19201^(1/2)+1)/8)))/(2*(x^2-300)) = 0 // * 2*(x^2-300)
(x-((1-19201^(1/2))/8))*(x-((19201^(1/2)+1)/8)) = 0
( x-((1-19201^(1/2))/8) )
x-((1-19201^(1/2))/8) = 0 // + (1-19201^(1/2))/8
x = (1-19201^(1/2))/8
( x-((19201^(1/2)+1)/8) )
x-((19201^(1/2)+1)/8) = 0 // + (19201^(1/2)+1)/8
x = (19201^(1/2)+1)/8
x in { (1-19201^(1/2))/8, (19201^(1/2)+1)/8 }
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