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D( x )
x+8 = 0
x+8 = 0
x+8 = 0
x+8 = 0 // - 8
x = -8
x in (-oo:-8) U (-8:+oo)
x/(x+8) = 3/2 // - 3/2
x/(x+8)-(3/2) = 0
x/(x+8)-3/2 = 0
(2*x)/(2*(x+8))+(-3*(x+8))/(2*(x+8)) = 0
2*x-3*(x+8) = 0
-x-24 = 0
(-x-24)/(2*(x+8)) = 0
(-x-24)/(2*(x+8)) = 0 // * 2*(x+8)
-x-24 = 0
-x-24 = 0 // + 24
-x = 24 // * -1
x = -24
x = -24
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