Question

Can you find the center and the radius of the circle from x2 + y2 -8x +4y =5

Answer 1

\[(x^2-8x)+(y^2+4y)=5\]
\[(x^2-8x+(\frac{8}{2})^2)+(y^2+4y+(\frac{4}{2})^2)=5+(\frac{8}{2})^2+(\frac{4}{2})^2\]

Answer 2

I think C=(4,-2) and radius r=5.

Answer 3

\[(x-4)^2+(y+2)^2=5+16+4\]

Answer 4

\[(x-4)^2+(y+2)^2=25\]

Answer 5

yes thats right emurr

Answer 6

thanks myininaya :)

Answer 7

np