x*x-4/x*x+2x

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Solution for x*x-4/x*x+2x equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

x*x+2*x-((4/x)*x) = 0

x*x+2*x-4 = 0

x^2+2*x-4 = 0

DELTA = 2^2-(-4*1*4)

DELTA = 20

DELTA > 0

x = (20^(1/2)-2)/(1*2) or x = (-20^(1/2)-2)/(1*2)

x = (2*5^(1/2)-2)/2 or x = (-2*5^(1/2)-2)/2

x in { (-2*5^(1/2)-2)/2, (2*5^(1/2)-2)/2 }

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