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D( x )
4*x-8 = 0
x^2+x-2 = 0
4*x-8 = 0
4*x-8 = 0
4*x-8 = 0 // + 8
4*x = 8 // : 4
x = 8/4
x = 2
x^2+x-2 = 0
x^2+x-2 = 0
x^2+x-2 = 0
DELTA = 1^2-(-2*1*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)-1)/(1*2) or x = (-9^(1/2)-1)/(1*2)
x = 1 or x = -2
x in (-oo:-2) U (-2:1) U (1:2) U (2:+oo)
((x^2+x-6)/(x^2+x-2))*((x-1)/(4*x-8)) = 0
((x^2+x-6)*(x-1))/((x^2+x-2)*(4*x-8)) = 0
x^2+x-6 = 0
x^2+x-6 = 0
DELTA = 1^2-(-6*1*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)-1)/(1*2) or x = (-25^(1/2)-1)/(1*2)
x = 2 or x = -3
(x+3)*(x-2) = 0
x^2+x-2 = 0
x^2+x-2 = 0
DELTA = 1^2-(-2*1*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)-1)/(1*2) or x = (-9^(1/2)-1)/(1*2)
x = 1 or x = -2
(x+2)*(x-1) = 0
((x+3)*(x-2))/((x+2)*(4*x-8)) = 0
( x+3 )
x+3 = 0 // - 3
x = -3
( x-2 )
x-2 = 0 // + 2
x = 2
x in { 2}
x = -3
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