Answer: The center is at the origin (0,0) with radius 5
Step 1
The equation of the circle is
3x² + 3y² = 75
find the factor and compress
3( x² + y² ) = 75
divide by 3 through
x² + y² = 25
x² + y² = ±√25
x² + y² = 5
The circle has its center at the origin (0, 0)