Find the centre and radius of the circle x² + y² + 4x - 8y - 5 = 0, (2-4) .r=5 (-2-4),r=4 (2 : 4),r=4 (-2,4),r=5

Find the center and radius of the circle x² + y² + 4x - 8y - 5 = 0.  (2-4),r=5   (-2,-4),r=4   (2,-4),r=4   (-2,4),r=5

Question:
Find the center and radius of the circle x² + y² + 4x - 8y - 5 = 0. 
(2,-4) .r=5
 (-2,-4),r=4 
 (2, 4),r=4 
 (-2,4),r=5 

Solution:

Higher Maths

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