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D( x )
4-x^2 = 0
6-(3*x) = 0
(2*x-1)/(4-x^2) = 0
4-x^2 = 0
4-x^2 = 0
-1*x^2 = -4 // : -1
x^2 = 4
x^2 = 4 // ^ 1/2
abs(x) = 2
x = 2 or x = -2
6-(3*x) = 0
6-(3*x) = 0
6-3*x = 0
6-3*x = 0 // - 6
-3*x = -6 // : -3
x = -6/(-3)
x = 2
(2*x-1)/(4-x^2) = 0
(2*x-1)/(4-x^2) = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x in (-oo:-2) U (-2:1/2) U (1/2:2) U (2:+oo)
((5*x^2)/(6-(3*x)))/((2*x-1)/(4-x^2)) = 0
((5*x^2)/(6-3*x))/((2*x-1)/(4-x^2)) = 0
(5*x^2*(4-x^2))/((6-3*x)*(2*x-1)) = 0
( 4-x^2 )
-1*x^2 = -4 // : -1
x^2 = 4
x^2 = 4 // ^ 1/2
abs(x) = 2
x = 2 or x = -2
( 5*x^2 )
5*x^2 = 0 // : 5
x^2 = 0
x = 0
x in { 2}
x in { -2}
x = 0
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