(x^2-7x-9)/8

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Solution for (x^2-7x-9)/8 equation: 


x in (-oo:+oo)

(x^2-(7*x)-9)/8 = 0

(x^2-7*x-9)/8 = 0

x^2-7*x-9 = 0

x^2-7*x-9 = 0

DELTA = (-7)^2-(-9*1*4)

DELTA = 85

DELTA > 0

x = (85^(1/2)+7)/(1*2) or x = (7-85^(1/2))/(1*2)

x = (85^(1/2)+7)/2 or x = (7-85^(1/2))/2

(x-((7-85^(1/2))/2))*(x-((85^(1/2)+7)/2)) = 0

((x-((7-85^(1/2))/2))*(x-((85^(1/2)+7)/2)))/8 = 0

( x-((7-85^(1/2))/2) )

x-((7-85^(1/2))/2) = 0 // + (7-85^(1/2))/2

x = (7-85^(1/2))/2

( x-((85^(1/2)+7)/2) )

x-((85^(1/2)+7)/2) = 0 // + (85^(1/2)+7)/2

x = (85^(1/2)+7)/2

x in { (7-85^(1/2))/2, (85^(1/2)+7)/2 }

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