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D( x )
2*x+2 = 0
4*x+4 = 0
x-1 = 0
2*x+2 = 0
2*x+2 = 0
2*x+2 = 0 // - 2
2*x = -2 // : 2
x = -2/2
x = -1
4*x+4 = 0
4*x+4 = 0
4*x+4 = 0 // - 4
4*x = -4 // : 4
x = -4/4
x = -1
x-1 = 0
x-1 = 0
x-1 = 0 // + 1
x = 1
x in (-oo:-1) U (-1:1) U (1:+oo)
x/(2*x+2) = (2*x-3)/(x-1)-((2*x)/(4*x+4)) // - (2*x-3)/(x-1)-((2*x)/(4*x+4))
x/(2*x+2)-((2*x-3)/(x-1))+(2*x)/(4*x+4) = 0
x/(2*x+2)+(-1*(2*x-3))/(x-1)+(2*x)/(4*x+4) = 0
(x*(x-1)*(4*x+4))/((2*x+2)*(x-1)*(4*x+4))+(-1*(2*x-3)*(2*x+2)*(4*x+4))/((2*x+2)*(x-1)*(4*x+4))+(2*x*(2*x+2)*(x-1))/((2*x+2)*(x-1)*(4*x+4)) = 0
x*(x-1)*(4*x+4)-1*(2*x-3)*(2*x+2)*(4*x+4)+2*x*(2*x+2)*(x-1) = 0
4*x^3-12*x^3-8*x^2+28*x-4*x+24 = 0
24*x-8*x^3-8*x^2+24 = 0
24*x-8*x^3-8*x^2+24 = 0
8*(3*x-x^3-x^2+3) = 0
3*x-x^3-x^2+3
3*x-x^2*(x+1)+3
3*(x+1)-x^2*(x+1)
(3-x^2)*(x+1)
8*(3-x^2)*(x+1) = 0
(8*(3-x^2)*(x+1))/((2*x+2)*(x-1)*(4*x+4)) = 0
(8*(3-x^2)*(x+1))/((2*x+2)*(x-1)*(4*x+4)) = 0 // * (2*x+2)*(x-1)*(4*x+4)
8*(3-x^2)*(x+1) = 0
( 3-x^2 )
-1*x^2 = -3 // : -1
x^2 = 3
x^2 = 3 // ^ 1/2
abs(x) = 3^(1/2)
x = 3^(1/2) or x = -3^(1/2)
( x+1 )
x+1 = 0 // - 1
x = -1
x in { -1}
x in { 3^(1/2), -3^(1/2) }
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