(x-11)/(x^2-7x-18)

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Solution for (x-11)/(x^2-7x-18) equation: 


D( x )

x^2-(7*x)-18 = 0

x^2-(7*x)-18 = 0

x^2-(7*x)-18 = 0

x^2-7*x-18 = 0

x^2-7*x-18 = 0

DELTA = (-7)^2-(-18*1*4)

DELTA = 121

DELTA > 0

x = (121^(1/2)+7)/(1*2) or x = (7-121^(1/2))/(1*2)

x = 9 or x = -2

x in (-oo:-2) U (-2:9) U (9:+oo)

(x-11)/(x^2-(7*x)-18) = 0

(x-11)/(x^2-7*x-18) = 0

x^2-7*x-18 = 0

x^2-7*x-18 = 0

DELTA = (-7)^2-(-18*1*4)

DELTA = 121

DELTA > 0

x = (121^(1/2)+7)/(1*2) or x = (7-121^(1/2))/(1*2)

x = 9 or x = -2

(x+2)*(x-9) = 0

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

x-11 = 0 // + 11

x = 11

x = 11

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