(x^2-1x-12)/2=99

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Solution for (x^2-1x-12)/2=99 equation: 


x in (-oo:+oo)

(x^2-(1*x)-12)/2 = 99 // - 99

(x^2-(1*x)-12)/2-99 = 0

(x^2-x-12)/2-99 = 0

(x^2-x-12)/2+(-99*2)/2 = 0

x^2-x-99*2-12 = 0

x^2-x-210 = 0

x^2-x-210 = 0

x^2-x-210 = 0

DELTA = (-1)^2-(-210*1*4)

DELTA = 841

DELTA > 0

x = (841^(1/2)+1)/(1*2) or x = (1-841^(1/2))/(1*2)

x = 15 or x = -14

(x+14)*(x-15) = 0

((x+14)*(x-15))/2 = 0

((x+14)*(x-15))/2 = 0 // * 2

(x+14)*(x-15) = 0

( x+14 )

x+14 = 0 // - 14

x = -14

( x-15 )

x-15 = 0 // + 15

x = 15

x in { -14, 15 }

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