How do you write the equation of the circle with radius 9 and center (-2,3)?
The equation of a circle in standard form is.
where (a ,b) are the coordinates of the centre and r, the radius.
here a = -2 , b = 3 and r = 9
substitute these values into the standard equation.
#rArr(x+2)^2+(y-3)^2=81" is the equation of the circle"#