7/x-6-7x+1/x+1

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Solution for 7/x-6-7x+1/x+1 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x-(7*x)+1/x-6+1 = 0

7/x-7*x+1/x-6+1 = 0

8*x^-1-7*x^1-5*x^0 = 0

(8*x^0-7*x^2-5*x^1)/(x^1) = 0 // * x^2

x^1*(8*x^0-7*x^2-5*x^1) = 0

x^1

8-7*x^2-5*x = 0

8-7*x^2-5*x = 0

DELTA = (-5)^2-(-7*4*8)

DELTA = 249

DELTA > 0

x = (249^(1/2)+5)/(-7*2) or x = (5-249^(1/2))/(-7*2)

x = (249^(1/2)+5)/(-14) or x = (5-249^(1/2))/(-14)

x in { (249^(1/2)+5)/(-14), (5-249^(1/2))/(-14)} 

x in { (249^(1/2)+5)/(-14), (5-249^(1/2))/(-14) }

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