# How do you write the standard equation of a circle with the given radius and center: r=4; C(3,-4)?

##### 1 Answer

May 17, 2018

See below

#### Explanation:

If you know the center

which in your case is

you can expand it into

and simplify/rearrange into

Not sure which one you refer to as "standard form", so I hope that one of these calculations fell into it