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D( x )
x+2 = 0
x+2 = 0
x+2 = 0
x+2 = 0 // - 2
x = -2
x in (-oo:-2) U (-2:+oo)
8/(x+2)+8/2 = 5 // - 5
8/(x+2)+8/2-5 = 0
8/(x+2)-5+4 = 0
8/(x+2)+(4*(x+2))/(x+2)+(-5*(x+2))/(x+2) = 0
4*(x+2)-5*(x+2)+8 = 0
4*x-5*x-10+16 = 0
6-x = 0
(6-x)/(x+2) = 0
(6-x)/(x+2) = 0 // * x+2
6-x = 0
6-x = 0 // - 6
-x = -6 // * -1
x = 6
x = 6
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