Question

The equation of this circle is (x +
)2 + (y +
)2 =
.

Answer 1

Answer:

x2 + y2 = r2, and this is the equation of a circle of radius r whose center is the origin O(0, 0). The equation of a circle of radius r and center the origin is x2 + y2 = r2.

I think this is the answer.