Question

What are the center and radius of the circle given by the equation ?

Answer 1

General formula of the circle

(x-a)² + (y - b)² = r²,

where (a,b) - coordinates of the center, r - radius of the circle.

(x-3)²+(y+4)²=4

(x-3)²+(y+4)²=2²

So, the center is (3, -4) and radius r = 2.

A. (3, –4); 2