Answer:
a) (x + 3)^2 + 1
we know that ( x + a )^2 = x^2 + 2ax + a^2
so just need to think whats number will be 6 after times 2
until here we can get (x + 3)^2
expand it you can only get x^2 + 6x + 9
so +1 to make it become 10
this is my method as I think it's fast to get the answer if you don't get it you may just follow completing the square formula
b) ( -3 , 1 )
you can just get it after you completing the square