i have a HUGE math exam tomorrow and i still don't know how to do completing the square..if you have something like y=x^2 + 6x + 5 and you NEED to you use completing the square to solve it, how do you do it?

please show it step by step

this is what i have so far, but after this i'm a bit stuck

y=x^2 + 6x + 5

-5 + 9= x^2 + 9

4= x^2 + 9

now what do i do?

THANK YOU FOR THE HELP!