Question

Which are the center and radius of the circle with equation (x + 5)2 + (y - 4)2 = 9?

Answer 1

Center (-5,4) radius 3

Explanation:

The standard equation of a circle is

(x-h)^2+(y-k)^2=r^2

where the center is (h,k) and r is the radius

so h=-5 in this case and k is 4

r^2=9 so r=3