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D( x )
x^2-(4*x)-4 = 0
x^2-(4*x)-4 = 0
x^2-(4*x)-4 = 0
x^2-4*x-4 = 0
x^2-4*x-4 = 0
DELTA = (-4)^2-(-4*1*4)
DELTA = 32
DELTA > 0
x = (32^(1/2)+4)/(1*2) or x = (4-32^(1/2))/(1*2)
x = (4*2^(1/2)+4)/2 or x = (4-4*2^(1/2))/2
x in (-oo:(4-4*2^(1/2))/2) U ((4-4*2^(1/2))/2:(4*2^(1/2)+4)/2) U ((4*2^(1/2)+4)/2:+oo)
-(7/(x^2-(4*x)-4)) > 0
-(7/(x^2-4*x-4)) > 0
(-1*7)/(x^2-4*x-4) > 0
x^2-4*x-4 = 0
x^2-4*x-4 = 0
DELTA = (-4)^2-(-4*1*4)
DELTA = 32
DELTA > 0
x = (32^(1/2)+4)/(1*2) or x = (4-32^(1/2))/(1*2)
x = (4*2^(1/2)+4)/2 or x = (4-4*2^(1/2))/2
(x-((4-4*2^(1/2))/2))*(x-((4*2^(1/2)+4)/2)) = 0
(-1*7)/((x-((4-4*2^(1/2))/2))*(x-((4*2^(1/2)+4)/2))) > 0
( -1 )
-1 > 0
x belongs to the empty set
( 7 )
7 > 0
x należy do R
( x-((4*2^(1/2)+4)/2) )
x-((4*2^(1/2)+4)/2) > 0 // + (4*2^(1/2)+4)/2
x > (4*2^(1/2)+4)/2
( x-((4-4*2^(1/2))/2) )
x-((4-4*2^(1/2))/2) > 0 // + (4-4*2^(1/2))/2
x > (4-4*2^(1/2))/2
(-oo:(4-4*2^(1/2))/2) ((4-4*2^(1/2))/2:(4*2^(1/2)+4)/2) ((4*2^(1/2)+4)/2:+oo) -1 - - - 7 + + + x-((4*2^(1/2)+4)/2) - - + x-((4-4*2^(1/2))/2) - + +
x in ((4-4*2^(1/2))/2:(4*2^(1/2)+4)/2)
((4-4*2^(1/2))/2:(4*2^(1/2)+4)/2)
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