I'm doing quadratic formula and i've simplified it down to the equation at the bottom. what do i do after? is that my answer because 5 & 17 have no other factors? or am i missing something?

No you could have left it as the last but one line or write them separately as

11/18 + √85 / 18 , 11/18 - √85/18

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)