SOLUTION: Did the centre and radius of the following circle:
x^2 + y^2 = 2*r*x
Please help me!
I know the equation is (x-a)^2 + (y-b)^2 = r^2
Where the letters a, b and r represent
Algebra.Com
Question 798878: Did the centre and radius of the following circle:
x^2 + y^2 = 2*r*x
Please help me!
I know the equation is (x-a)^2 + (y-b)^2 = r^2
Where the letters a, b and r represent numbers
I also understand how to do this question if it was set out like this:
x^2 + y^2 - 8*x - 9 = 0 and questions like that but I don't know how to do it if
It is set out like the question I asked do I move r and x over or something!?
Please help me!
Thanks!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Did the centre and radius of the following circle:
x^2 + y^2 = 2*r*x
---------
Did it what?
---
x^2 - 2rx + y^2 = 0
x^2 - 2rx + r^2 + y^2 = r^2
(x-r)^2 + y^2 = r^2
The center is (r,0)
radius = r
------------
For any value of r, the center is on the x-axis and the circle tangent to the y-axis.
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