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D( x )
x^2 = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
x^2-(((9*x)/4)*x)-(24*x^2)-((36/4)*x^2)+5*x-((8*36*x*x)/(x^2))-6 = 0
x^2+(-9/4)*x^2-24*x^2-9*x^2+5*x-288-6 = 0
5*x-137/4*x^2-294 = 0
DELTA = 5^2-(-294*(-137/4)*4)
DELTA = -40253
DELTA < 0
x belongs to the empty set
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