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D( x )
x+1 = 0
x+1 = 0
x+1 = 0
x+1 = 0 // - 1
x = -1
x in (-oo:-1) U (-1:+oo)
(2*x-3)/2+(5*x)/(x+1) = x // - x
(2*x-3)/2+(5*x)/(x+1)-x = 0
((2*x-3)*(x+1))/(2*(x+1))+(2*5*x)/(2*(x+1))+(2*(-x)*(x+1))/(2*(x+1)) = 0
(2*x-3)*(x+1)+2*(-x)*(x+1)+2*5*x = 0
2*x^2-2*x^2+9*x-2*x-3 = 0
7*x-3 = 0
(7*x-3)/(2*(x+1)) = 0
(7*x-3)/(2*(x+1)) = 0 // * 2*(x+1)
7*x-3 = 0
7*x-3 = 0 // + 3
7*x = 3 // : 7
x = 3/7
x = 3/7
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