Your work is correct
Just bring the 4 from Left Hand Side to the right
The term on RHS is the square of radius
ie; $\displaystyle \sqrt{\frac{21}{4}}$ is the radius
and the center coordinates are (1,-2,0)..
Your work is correct Just bring the 4 from Left Hand Side to the right
The term on RHS is the square of radius
ie; $\displaystyle \sqrt{\frac{21}{4}}$ is the radius
and the center coordinates are (1,-2,0)..