You're not cancelling that out. You are done, this is the answer.
Sometimes you have to accept having big bad answers.
Bacterius, Go back to your comment. Hit edit and just delete everything. You don't seem to be able to clear evrything cause it sats your message is too short...so I just hit a key. Must be a better way. BTW your earlier comment re sqrt(28)=7 isn't there anymore anyway ...where'd it go?
Glad you got it now Realistic. Hope that helped.
Yes you factorize the top part, so the next to the root gets eliminated and the becomes
Debsta, concerning my root error ... well I erased it 1 second after I sent the comment (I read it while page was loading) ... I wonder how you managed to read it