SOLUTION: What are the coordinates of the centre of x^2+y^2-4x+2y-4=0???
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Question 141249: What are the coordinates of the centre of x^2+y^2-4x+2y-4=0???
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
x^2-4x+y^2+2y=4 __ x^2-4x+4+y^2+2y+1=4+4+1 __ (x-2)^2+(y+1)^2=3^2
cent(er) at (2,-1) with a radius of 3
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