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D( x )
2*x-10 = 0
2*x-10 = 0
2*x-10 = 0
2*x-10 = 0 // + 10
2*x = 10 // : 2
x = 10/2
x = 5
x in (-oo:5) U (5:+oo)
x*((x^2-25)/3)*(24/(2*x-10)) = 0
(24*x*(x^2-25))/(3*(2*x-10)) = 0
( x )
x = 0
( x^2-25 )
1*x^2 = 25 // : 1
x^2 = 25
x^2 = 25 // ^ 1/2
abs(x) = 5
x = 5 or x = -5
x in { 5}
x in { 0, -5 }
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