x-40/x=0

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Solution for x-40/x=0 equation: 


D( x )

x = 0

x = 0

x = 0

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

x-(40/x) = 0

x-40*x^-1 = 0

1*x^1-40*x^-1 = 0

(1*x^2-40*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-40*x^0) = 0

x^1

x^2-40 = 0

x^2-40 = 0

DELTA = 0^2-(-40*1*4)

DELTA = 160

DELTA > 0

x = (160^(1/2)+0)/(1*2) or x = (0-160^(1/2))/(1*2)

x = 2*10^(1/2) or x = -2*10^(1/2)

x in { -2*10^(1/2), 2*10^(1/2)} 

x in { -2*10^(1/2), 2*10^(1/2) }

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