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D( x )
x+5 = 0
8*x+1 = 0
x+5 = 0
x+5 = 0
x+5 = 0 // - 5
x = -5
8*x+1 = 0
8*x+1 = 0
8*x+1 = 0 // - 1
8*x = -1 // : 8
x = -1/8
x in (-oo:-5) U (-5:-1/8) U (-1/8:+oo)
533/(8*x+1) = (2*x)/(x+5) // - (2*x)/(x+5)
533/(8*x+1)-((2*x)/(x+5)) = 0
533/(8*x+1)-2*x*(x+5)^-1 = 0
533/(8*x+1)+(-2*x)/(x+5) = 0
(533*(x+5))/((8*x+1)*(x+5))+(-2*x*(8*x+1))/((8*x+1)*(x+5)) = 0
533*(x+5)-2*x*(8*x+1) = 0
531*x-16*x^2+2665 = 0
531*x-16*x^2+2665 = 0
531*x-16*x^2+2665 = 0
DELTA = 531^2-(-16*4*2665)
DELTA = 452521
DELTA > 0
x = (452521^(1/2)-531)/(-16*2) or x = (-452521^(1/2)-531)/(-16*2)
x = (452521^(1/2)-531)/(-32) or x = (452521^(1/2)+531)/32
(x-((452521^(1/2)-531)/(-32)))*(x-((452521^(1/2)+531)/32)) = 0
((x-((452521^(1/2)-531)/(-32)))*(x-((452521^(1/2)+531)/32)))/((8*x+1)*(x+5)) = 0
((x-((452521^(1/2)-531)/(-32)))*(x-((452521^(1/2)+531)/32)))/((8*x+1)*(x+5)) = 0 // * (8*x+1)*(x+5)
(x-((452521^(1/2)-531)/(-32)))*(x-((452521^(1/2)+531)/32)) = 0
( x-((452521^(1/2)+531)/32) )
x-((452521^(1/2)+531)/32) = 0 // + (452521^(1/2)+531)/32
x = (452521^(1/2)+531)/32
( x-((452521^(1/2)-531)/(-32)) )
x-((452521^(1/2)-531)/(-32)) = 0 // + (452521^(1/2)-531)/(-32)
x = (452521^(1/2)-531)/(-32)
x in { (452521^(1/2)+531)/32, (452521^(1/2)-531)/(-32) }
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