Question

Write the equation of the circle with center (6, -5) and radius r = 4.

Answer 1

The general equation of a circle is
`(x-a)^2+(y-b)^2=r^2`, where
`C(a,b)` is the center and
`r` is the radius. By the statement:


`(x-a)^2+(y-b)^2=r^2\\\\ (x-6)^2+(y-(-5))^2=4^2\\\\ \boxed{(x-6)^2+(y+5)^2=16}`