The equation of circle with center (h,k) and radius r is,
[tex](x-h)^2+(y-k)^2=r^2[/tex]
Determine the equation of circle with center (5,-4) and radius 7.
[tex]\begin{gathered} (x-5)^2+(y-(-4))^2=(7)^2 \\ (x-5)^2+(y+4)^2=49 \end{gathered}[/tex]
So equation of circle is,
[tex](x-5)^2+(y+4)^2=49[/tex]
Answer: C
