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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
((7*x-3)^2)/x-1 = 0
((7*x-3)^2)/x+(-1*x)/x = 0
(7*x-3)^2-1*x = 0
49*x^2-43*x+9 = 0
49*x^2-43*x+9 = 0
49*x^2-43*x+9 = 0
DELTA = (-43)^2-(4*9*49)
DELTA = 85
DELTA > 0
x = (85^(1/2)+43)/(2*49) or x = (43-85^(1/2))/(2*49)
x = (85^(1/2)+43)/98 or x = (43-85^(1/2))/98
(x-((43-85^(1/2))/98))*(x-((85^(1/2)+43)/98)) = 0
((x-((43-85^(1/2))/98))*(x-((85^(1/2)+43)/98)))/x = 0
((x-((43-85^(1/2))/98))*(x-((85^(1/2)+43)/98)))/x = 0 // * x
(x-((43-85^(1/2))/98))*(x-((85^(1/2)+43)/98)) = 0
( x-((43-85^(1/2))/98) )
x-((43-85^(1/2))/98) = 0 // + (43-85^(1/2))/98
x = (43-85^(1/2))/98
( x-((85^(1/2)+43)/98) )
x-((85^(1/2)+43)/98) = 0 // + (85^(1/2)+43)/98
x = (85^(1/2)+43)/98
x in { (43-85^(1/2))/98, (85^(1/2)+43)/98 }
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