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D( x )
6-x^2-x = 0
6-x^2-x = 0
6-x^2-x = 0
6-x^2-x = 0
DELTA = (-1)^2-(-1*4*6)
DELTA = 25
DELTA > 0
x = (25^(1/2)+1)/(-1*2) or x = (1-25^(1/2))/(-1*2)
x = -3 or x = 2
x in (-oo:-3) U (-3:2) U (2:+oo)
(2-(16*x))/(6-x^2-x) = 0
(2-16*x)/(6-x^2-x) = 0
6-x^2-x = 0
6-x^2-x = 0
DELTA = (-1)^2-(-1*4*6)
DELTA = 25
DELTA > 0
x = (25^(1/2)+1)/(-1*2) or x = (1-25^(1/2))/(-1*2)
x = -3 or x = 2
(x+3)*(x-2) = 0
(2-16*x)/((x+3)*(x-2)) = 0
2-16*x = 0 // - 2
-16*x = -2 // : -16
x = -2/(-16)
x = 1/8
x = 1/8
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