Substitute the given values into the center-radius form of the equation of a circle.
[tex](x-h)^2+(y-k)^2=r^2[/tex]
where (h,k) is the center of the circle and r is the radius of the circle.
Thus, we have the following equation.
[tex]\begin{gathered} (x-(-4))^2+(y-(-1))^2=(9)^2 \\ (x+4)^2+(y+1)^2=81 \end{gathered}[/tex]
Thus, the answers for the blanks are as follows.
Blank 1: +4
Blank 2: +1
Blank 3: 81
