(x^2-11x-18)/((x-9))

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Solution for (x^2-11x-18)/((x-9)) equation: 


D( x )

x-9 = 0

x-9 = 0

x-9 = 0

x-9 = 0 // + 9

x = 9

x in (-oo:9) U (9:+oo)

(x^2-(11*x)-18)/(x-9) = 0

(x^2-11*x-18)/(x-9) = 0

x^2-11*x-18 = 0

x^2-11*x-18 = 0

DELTA = (-11)^2-(-18*1*4)

DELTA = 193

DELTA > 0

x = (193^(1/2)+11)/(1*2) or x = (11-193^(1/2))/(1*2)

x = (193^(1/2)+11)/2 or x = (11-193^(1/2))/2

(x-((11-193^(1/2))/2))*(x-((193^(1/2)+11)/2)) = 0

((x-((11-193^(1/2))/2))*(x-((193^(1/2)+11)/2)))/(x-9) = 0

( x-((11-193^(1/2))/2) )

x-((11-193^(1/2))/2) = 0 // + (11-193^(1/2))/2

x = (11-193^(1/2))/2

( x-((193^(1/2)+11)/2) )

x-((193^(1/2)+11)/2) = 0 // + (193^(1/2)+11)/2

x = (193^(1/2)+11)/2

x in { (11-193^(1/2))/2, (193^(1/2)+11)/2 }

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