Question

Help me number 2. no nonsense answer. if not, i will report it

Answer 1

x²+y²-4x-2y-4=0 can be written as

(x²-4x+4)-4+(y²-2y+1)-1-4=0 (completing square)

(x-2)²+(y-1)²=9

Centre=(2,1) and radius=3