# How do you write the equation of the circle in standard form, identify the center and radius of #9x^2+9y^2+54x-36y+17=0#?

##### 1 Answer

Feb 26, 2017

Equation of the circle in standard form is

#### Explanation:

Standard form of equation of a circle is

which has a radius

Now

or

or

or

and as is observed. its center is

graph{9x^2+9y^2+54x-36y+17=0 [-13.125, 6.875, -3.32, 6.68]}