7x/x+3-x+1/x+3

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Solution for 7x/x+3-x+1/x+3 equation: 


D( x )

x = 0

x = 0

x = 0

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

1/x-x+(7*x)/x+3+3 = 0

1*x^-1-1*x^1+13*x^0 = 0

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

x^1*(13*x^1-1*x^2+1*x^0) = 0

x^1

13*x-x^2+1 = 0

13*x-x^2+1 = 0

DELTA = 13^2-(-1*1*4)

DELTA = 173

DELTA > 0

x = (173^(1/2)-13)/(-1*2) or x = (-173^(1/2)-13)/(-1*2)

x = (173^(1/2)-13)/(-2) or x = (173^(1/2)+13)/2

x in { (173^(1/2)-13)/(-2), (173^(1/2)+13)/2} 

x in { (173^(1/2)-13)/(-2), (173^(1/2)+13)/2 }

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