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D( x )
2*x-2 = 0
2*x-2 = 0
2*x-2 = 0
2*x-2 = 0 // + 2
2*x = 2 // : 2
x = 2/2
x = 1
x in (-oo:1) U (1:+oo)
(6*x^2+4*x-16)/(2*x-2) = 0
6*x^2+4*x-16 = 0
2*(3*x^2+2*x-8) = 0
3*x^2+2*x-8 = 0
DELTA = 2^2-(-8*3*4)
DELTA = 100
DELTA > 0
x = (100^(1/2)-2)/(2*3) or x = (-100^(1/2)-2)/(2*3)
x = 4/3 or x = -2
2*(x+2)*(x-4/3) = 0
(2*(x+2)*(x-4/3))/(2*x-2) = 0
( x+2 )
x+2 = 0 // - 2
x = -2
( x-4/3 )
x-4/3 = 0 // + 4/3
x = 4/3
x in { -2, 4/3 }
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