I believe you meant:  Use completing the square to determine the center and radius of the circle represented by this equation:   <span>X^2+y^2-10x+6y=15
x^2 - 10x + 25 - 25 + y^2 + 6y + 9 - 9 = 15
Then:
     (x-5)^2               +   (y+3)^2            = 24   = 2sqrt(6)
This circle is centered at (5,-3) and has radius 2sqrt(6).</span>
        
             
        
        
        
9999 is largest 4 digit number, and 100^2 is 10000, or 1 greater than the largest 4 digit number. This means that the closest square root of the largest perfect square is most likely 99. So 99^2 (9801)is the largest perfect square of four digits.
        
             
        
        
        
Answer:
your a very beautiful dumb.asss
Step-by-step explanation:
go give your self a bj 
 
        
                    
             
        
        
        
$ 9802.9and it said the answer had to be 20 characters long so i wrote this
        
             
        
        
        
5x-2+3x=17+12x-23 combine like terms 
8x-2=12x-6
-8x    -8x
-2=4x-6
+6     +6
4=4x divide each side by 4 
x=1