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D( x )
((x^2-300)^1)/2 = 0
((x^2-300)^1)/2 = 0
((x^2-300)^1)/2 = 0
(x^2-300)/2 = 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
2-2*x*(x^2-300)^-1 = 0
(-2*x)/(x^2-300)+2 = 0
(-2*x)/(x^2-300)+(2*(x^2-300))/(x^2-300) = 0
2*(x^2-300)-2*x = 0
2*x^2-2*x-600 = 0
2*x^2-2*x-600 = 0
2*(x^2-x-300) = 0
x^2-x-300 = 0
DELTA = (-1)^2-(-300*1*4)
DELTA = 1201
DELTA > 0
x = (1201^(1/2)+1)/(1*2) or x = (1-1201^(1/2))/(1*2)
x = (1201^(1/2)+1)/2 or x = (1-1201^(1/2))/2
2*(x-((1-1201^(1/2))/2))*(x-((1201^(1/2)+1)/2)) = 0
(2*(x-((1-1201^(1/2))/2))*(x-((1201^(1/2)+1)/2)))/(x^2-300) = 0
(2*(x-((1-1201^(1/2))/2))*(x-((1201^(1/2)+1)/2)))/(x^2-300) = 0 // * x^2-300
2*(x-((1-1201^(1/2))/2))*(x-((1201^(1/2)+1)/2)) = 0
( x-((1-1201^(1/2))/2) )
x-((1-1201^(1/2))/2) = 0 // + (1-1201^(1/2))/2
x = (1-1201^(1/2))/2
( x-((1201^(1/2)+1)/2) )
x-((1201^(1/2)+1)/2) = 0 // + (1201^(1/2)+1)/2
x = (1201^(1/2)+1)/2
x in { (1-1201^(1/2))/2, (1201^(1/2)+1)/2 }
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