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Is this a simple circle, with radius 1/2?

  • Thread starter seand
  • Start date
  • #1
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I'm trying to understand this expression:
[tex]y=x^2+y^2[/tex]

Using wolfram alpha it tells me this is a circle of radius 1/2

But to me I'm unfamiliar with this way of setting up a circle. Specifically the y on both sides of the equation is troubling me. How would you interpret it? Would you reduce it somewhat before interpreting it?
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
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I would write it as 0=x^2+y^2-y and complete the square in y.
 
  • #3
7
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Completing the square worked perfectly. Thank you.
 

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