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Thank you for your time

Guest May 12, 2018
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A.

 

x^2  + y^2 - 4x -6y -12  = 0 

 

x^2  - 4x   + y^2   - 6y    = 12              complete the square on x and y

 

x^2  - 4x  + 4  + y^2  - 6y  + 9  =  12 + 4  + 9        factor the left side

 

(x -  2)^2  +  ( y - 3)^2   =  25

 

 

B.  This is a circle  centered at   ( 2, 3)   with a radius of 5

 

C. Here's the graph :  https://www.desmos.com/calculator/e4mzndmixp

 

 

cool cool cool

CPhill  May 12, 2018

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