5x+9+(2/x+6)

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Solution for 5x+9+(2/x+6) equation: 


D( x )

x = 0

x = 0

x = 0

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

5*x+2/x+6+9 = 0

5*x^1+2*x^-1+15*x^0 = 0

(5*x^2+15*x^1+2*x^0)/(x^1) = 0 // * x^2

x^1*(5*x^2+15*x^1+2*x^0) = 0

x^1

5*x^2+15*x+2 = 0

5*x^2+15*x+2 = 0

DELTA = 15^2-(2*4*5)

DELTA = 185

DELTA > 0

x = (185^(1/2)-15)/(2*5) or x = (-185^(1/2)-15)/(2*5)

x = (185^(1/2)-15)/10 or x = (-(185^(1/2)+15))/10

x in { (-(185^(1/2)+15))/10, (185^(1/2)-15)/10} 

x in { (-(185^(1/2)+15))/10, (185^(1/2)-15)/10 }

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