(x+7/x-10)=0

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Solution for (x+7/x-10)=0 equation: 


D( x )

x = 0

x = 0

x = 0

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

x+7/x-10 = 0

1*x^1+7*x^-1-10*x^0 = 0

(1*x^2-10*x^1+7*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-10*x^1+7*x^0) = 0

x^1

x^2-10*x+7 = 0

x^2-10*x+7 = 0

DELTA = (-10)^2-(1*4*7)

DELTA = 72

DELTA > 0

x = (72^(1/2)+10)/(1*2) or x = (10-72^(1/2))/(1*2)

x = (6*2^(1/2)+10)/2 or x = (10-6*2^(1/2))/2

x in { (10-6*2^(1/2))/2, (6*2^(1/2)+10)/2} 

x in { (10-6*2^(1/2))/2, (6*2^(1/2)+10)/2 }

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