# How do you find the equation of the circle given center (-7,5) and radius=9?

##### 1 Answer

Jun 6, 2016

#### Explanation:

The standard form of the equation of a circle is.

#color(red)(|bar(ul(color(white)(a/a)color(black)((x-a)^2+(y-b)^2=r^2)color(white)(a/a)|)))#

where (a ,b) are the coordinates of the centre and r, the radius.here a = -7 , b = 5 and r = 9

#rArr(x+7)^2+(y-5)^2=81" is the equation of the circle"#