(x2-16)/x-4

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Solution for (x2-16)/x-4 equation:


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

(x^2-16)/x-4 = 0

(x^2-16)/x+(-4*x)/x = 0

x^2-4*x-16 = 0

x^2-4*x-16 = 0

x^2-4*x-16 = 0

DELTA = (-4)^2-(-16*1*4)

DELTA = 80

DELTA > 0

x = (80^(1/2)+4)/(1*2) or x = (4-80^(1/2))/(1*2)

x = (4*5^(1/2)+4)/2 or x = (4-4*5^(1/2))/2

(x-((4-4*5^(1/2))/2))*(x-((4*5^(1/2)+4)/2)) = 0

((x-((4-4*5^(1/2))/2))*(x-((4*5^(1/2)+4)/2)))/x = 0

((x-((4-4*5^(1/2))/2))*(x-((4*5^(1/2)+4)/2)))/x = 0 // * x

(x-((4-4*5^(1/2))/2))*(x-((4*5^(1/2)+4)/2)) = 0

( x-((4*5^(1/2)+4)/2) )

x-((4*5^(1/2)+4)/2) = 0 // + (4*5^(1/2)+4)/2

x = (4*5^(1/2)+4)/2

( x-((4-4*5^(1/2))/2) )

x-((4-4*5^(1/2))/2) = 0 // + (4-4*5^(1/2))/2

x = (4-4*5^(1/2))/2

x in { (4*5^(1/2)+4)/2, (4-4*5^(1/2))/2 }

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