i am stuck rationalising the denominator of this -

(9√6 -8)/(√6 -1)

the book says (46 + √6) / 5

but i keep coming out with a numerator of 28 + √6 or something. if someone could step me through it the help would be much appreciated. thanks!

p.s my first ever time posting, ithinkthis is the right section for this problem ^_^