Question

Write the equation of the circunference with center C(-1, -5), and radius 7.

Answer 1

Hi, I don't know exactly how to begin

Answer 2

A circle is the set of points equidistant from a point C(h,k) called the center. The fixed distance r from the center to any point on the circle is called the radius.

The standard equation of a circle with center C(h,k) and radius r is as follows:

(x - h)2 + (y - k)2 = r2

Answer 3

Clarifying that it is "squared":
(x - h)^2 + (y - k)^2 = r^2

Answer 4

Ok, but my h and k are negative

Answer 5

Then you get -(-h) = +h.

Answer 6

i get this: (x-1)^2+(y-5)^2=7^2

Answer 7

It is +1 and +5 because (-(-1)) = +1 and (-(-5)) = +5

Answer 8

ahhh i got it!

Answer 9

Thank U!