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The center of the circle x^2 + y^2 = 8x - 5y + 35 with equation is the point (x,y). What is (x,y)?

 Oct 9, 2020
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Re-arrange

 

x^2 -8x      +    y^2+5y      = 35            complete the square for x and y

(x-4)^2      +   (y+2.5)^2       =   35   + 16 + 6.25

x,y =   (4 , - 2.5)

 Oct 9, 2020

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