3/x-1/(x+2)

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Solution for 3/x-1/(x+2) equation: 


D( x )

x+2 = 0

x = 0

x+2 = 0

x+2 = 0

x+2 = 0 // - 2

x = -2

x = 0

x = 0

x in (-oo:-2) U (-2:0) U (0:+oo)

3/x-(1/(x+2)) = 0

3/x-(x+2)^-1 = 0

3/x-1/(x+2) = 0

(-1*x)/(x*(x+2))+(3*(x+2))/(x*(x+2)) = 0

3*(x+2)-1*x = 0

2*x+6 = 0

(2*x+6)/(x*(x+2)) = 0

(2*x+6)/(x*(x+2)) = 0 // * x*(x+2)

2*x+6 = 0

2*x+6 = 0 // - 6

2*x = -6 // : 2

x = -6/2

x = -3

x = -3

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