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D( x )
2*x^2-(6*x) = 0
2*x^2-(6*x) = 0
2*x^2-(6*x) = 0
2*x^2-6*x = 0
2*x^2-6*x = 0
DELTA = (-6)^2-(0*2*4)
DELTA = 36
DELTA > 0
x = (36^(1/2)+6)/(2*2) or x = (6-36^(1/2))/(2*2)
x = 3 or x = 0
x in (-oo:0) U (0:3) U (3:+oo)
(3*x^2-(4*x)-7)/(2*x^2-(6*x))-1 = 0
(3*x^2-4*x-7)/(2*x^2-6*x)-1 = 0
2*x^2-6*x = 0
2*x^2-6*x = 0
2*x*(x-3) = 0
x-3 = 0 // + 3
x = 3
2*x*(x-3) = 0
(3*x^2-4*x-7)/(2*x*(x-3))-1 = 0
(3*x^2-4*x-7)/(2*x*(x-3))+(-1*2*x*(x-3))/(2*x*(x-3)) = 0
3*x^2-1*2*x*(x-3)-4*x-7 = 0
x^2+2*x-7 = 0
x^2+2*x-7 = 0
x^2+2*x-7 = 0
DELTA = 2^2-(-7*1*4)
DELTA = 32
DELTA > 0
x = (32^(1/2)-2)/(1*2) or x = (-32^(1/2)-2)/(1*2)
x = (4*2^(1/2)-2)/2 or x = (-4*2^(1/2)-2)/2
(x-((-4*2^(1/2)-2)/2))*(x-((4*2^(1/2)-2)/2)) = 0
((x-((-4*2^(1/2)-2)/2))*(x-((4*2^(1/2)-2)/2)))/(2*x*(x-3)) = 0
((x-((-4*2^(1/2)-2)/2))*(x-((4*2^(1/2)-2)/2)))/(2*x*(x-3)) = 0 // * 2*x*(x-3)
(x-((-4*2^(1/2)-2)/2))*(x-((4*2^(1/2)-2)/2)) = 0
( x-((-4*2^(1/2)-2)/2) )
x-((-4*2^(1/2)-2)/2) = 0 // + (-4*2^(1/2)-2)/2
x = (-4*2^(1/2)-2)/2
( x-((4*2^(1/2)-2)/2) )
x-((4*2^(1/2)-2)/2) = 0 // + (4*2^(1/2)-2)/2
x = (4*2^(1/2)-2)/2
x in { (-4*2^(1/2)-2)/2, (4*2^(1/2)-2)/2 }
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