Question

I need help finding the center and radius of this sphere

Answer 1

sphere......is where? :)

Answer 2

\[x^2+y^2+z^2+4x-2z-8=0\]

Ive gotten it to this part

\[(x+2)^2+(y+0)^2-\]
and im not sure how to do the z part plz help but do not give it to me

Answer 3

(z-1)^2=z^2-2z+1
does this help??

Answer 4

yes i guess it does. lol I guess i was just being retarded... lol

Answer 5

so whats the centre and radius?