What’s the correct answer for this?

a) the co-ordinates of the center are (-3,4) and the length of the radius is 10 units

Center (h,k) = (-3 ,4) and radius 'r' = 10

Step-by-step explanation:

Step(i):-

Given circle equation is

Dividing "2' on both sides, we get

Step(ii):-

now

by using (a+b)² =a²+2 a b+b²

              (a-b)² =a²-2 a b+b²

by comparing

Final answer:-

Center (h,k) = (-3 ,4) and radius 'r' = 10

answer is x<

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!