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D( x )
3*x = 0
x = 0
2*x = 0
3*x = 0
3*x = 0
3*x = 0 // : 3
x = 0
x = 0
x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
(6*x-9)/(3*x)+1/(2*x) = 2/x // - 2/x
(6*x-9)/(3*x)+1/(2*x)-(2/x) = 0
(6*x-9)/(3*x)+1/(2*x)-2*x^-1 = 0
(6*x-9)/(3*x)+1/(2*x)-2/x = 0
(2*x*x*(6*x-9))/(2*3*x*x*x)+(1*3*x*x)/(2*3*x*x*x)+(-2*2*3*x*x)/(2*3*x*x*x) = 0
2*x*x*(6*x-9)+1*3*x*x-2*2*3*x*x = 0
12*x^3-15*x^2-12*x^2 = 0
12*x^3-27*x^2 = 0
12*x^3-27*x^2 = 0
3*x^2*(4*x-9) = 0
4*x-9 = 0 // + 9
4*x = 9 // : 4
x = 9/4
3*x^2*(x-9/4) = 0
(3*x^2*(x-9/4))/(2*3*x*x*x) = 0
(3*x^2*(x-9/4))/(2*3*x*x*x) = 0 // * 2*3*x*x*x
3*x^2*(x-9/4) = 0
( 3*x^2 )
3*x^2 = 0 // : 3
x^2 = 0
x = 0
( x-9/4 )
x-9/4 = 0 // + 9/4
x = 9/4
x in { 0}
x = 9/4
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