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Find the center and radius of the circle whose equation is  x^2 − 7x + y^2 + 9y −1 =0

 Mar 4, 2022
 #1
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Complete the square for x and y

 

(x-3.5)^2      +   (y+ 4.5)^2   = 1   +  12.25   + 20.25    <===========  red part is  r2

 

center =   (3.5 , -4.5)  

 Mar 4, 2022

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