(1/x)-(3/(x+3))

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Solution for (1/x)-(3/(x+3)) equation: 


D( x )

x = 0

x+3 = 0

x = 0

x = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

x in (-oo:-3) U (-3:0) U (0:+oo)

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

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

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

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

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

3-2*x = 0

(3-2*x)/(x*(x+3)) = 0

(3-2*x)/(x*(x+3)) = 0 // * x*(x+3)

3-2*x = 0

3-2*x = 0 // - 3

-2*x = -3 // : -2

x = -3/(-2)

x = 3/2

x = 3/2

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