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D( x )
x^2+9*x+10 = 0
x^2+9*x+10 = 0
x^2+9*x+10 = 0
x^2+9*x+10 = 0
DELTA = 9^2-(1*4*10)
DELTA = 41
DELTA > 0
x = (41^(1/2)-9)/(1*2) or x = (-41^(1/2)-9)/(1*2)
x = (41^(1/2)-9)/2 or x = (-(41^(1/2)+9))/2
x in (-oo:(-(41^(1/2)+9))/2) U ((-(41^(1/2)+9))/2:(41^(1/2)-9)/2) U ((41^(1/2)-9)/2:+oo)
(x^2-64)/(x^2+9*x+10) = 0
x^2+9*x+10 = 0
x^2+9*x+10 = 0
DELTA = 9^2-(1*4*10)
DELTA = 41
DELTA > 0
x = (41^(1/2)-9)/(1*2) or x = (-41^(1/2)-9)/(1*2)
x = (41^(1/2)-9)/2 or x = (-(41^(1/2)+9))/2
(x+(41^(1/2)+9)/2)*(x-((41^(1/2)-9)/2)) = 0
(x^2-64)/((x+(41^(1/2)+9)/2)*(x-((41^(1/2)-9)/2))) = 0
1*x^2 = 64 // : 1
x^2 = 64
x^2 = 64 // ^ 1/2
abs(x) = 8
x = 8 or x = -8
x in { 8, -8 }
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