The above post is correct, add bx to both sides and multiply by 1/x to get x+18/x=b Plug in any value of x to get a valid value for b. For example when x=1 then b=19 so x^2 -19x+18=0 is a solution. This solution is factorable as (x-1)(x-18). Another solution is x=-1 which gives b=-19 and the quadrat...