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D( x )
2*x-3 = 0
2*x-3 = 0
2*x-3 = 0
2*x-3 = 0 // + 3
2*x = 3 // : 2
x = 3/2
x in (-oo:3/2) U (3/2:+oo)
(4*x^2-9)/(2*x-3) = 0
4*x^2 = 9 // : 4
x^2 = 9/4
x^2 = 9/4 // ^ 1/2
abs(x) = 3/2
x = 3/2 or x = -3/2
x in { 3/2}
x = -3/2
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