# How do you find the center and radius of the circle given #x^2+(y+2)^2=4#?

##### 1 Answer

Nov 24, 2016

#### Answer:

Please see the explanation.

#### Explanation:

The standard form for the equation of a circle is:

where

I suggest that you modify any given equation into this form and then report the easily observed values.

Change the + 2 to - -2:

Insert a -0 in the x term:

Write the constant as a square:

It is easily observed that the center is