(-5-1/x)(2x)(x)=0

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Solution for (-5-1/x)(2x)(x)=0 equation: 


D( x )

x = 0

x = 0

x = 0

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

2*x*x*(-(1/x)-5) = 0

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

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

( -x^-1-5 )

-1*x^-1 = 5 // : -1

x^-1 = -5

-1 < 0

1/(x^1) = -5 // * x^1

1 = -5*x^1 // : -5

-1/5 = x^1

x = -1/5

( 2*x^2 )

2*x^2 = 0 // : 2

x^2 = 0

x = 0

x in { 0} 

x = -1/5

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