d-12/d=8/10

Solution for d-12/d=8/10 equation:

D( d )

d = 0

d = 0

d = 0

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

d-(12/d) = 8/10 // - 8/10

d-(12/d)-(8/10) = 0

d-12*d^-1-4/5 = 0

1*d^1-12*d^-1-4/5*d^0 = 0

(1*d^2-4/5*d^1-12*d^0)/(d^1) = 0 // * d^2

d^1*(1*d^2-4/5*d^1-12*d^0) = 0

d^1

d^2+(-4/5)*d-12 = 0

d^2+(-4/5)*d-12 = 0

DELTA = (-4/5)^2-(-12*1*4)

DELTA = 1216/25

DELTA > 0

d = ((1216/25)^(1/2)-(-4/5))/(1*2) or d = (-(-4/5)-(1216/25)^(1/2))/(1*2)

d = ((1216/25)^(1/2)+4/5)/2 or d = (4/5-(1216/25)^(1/2))/2

d in { (4/5-(1216/25)^(1/2))/2, ((1216/25)^(1/2)+4/5)/2} 

d in { (4/5-(1216/25)^(1/2))/2, ((1216/25)^(1/2)+4/5)/2 }