How do you write the equation of the circle in standard form? and what is the center and radius of it?

A step-by-step view would really help to understand for future problems.

Thanks!

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- Nov 29th 2008, 07:58 PMmeiyukichanEquation of a Circle. HELP!
How do you write the equation of the circle in standard form? and what is the center and radius of it?

A step-by-step view would really help to understand for future problems.

Thanks! - Nov 29th 2008, 10:40 PMmr fantastic
- Nov 29th 2008, 11:04 PMmeiyukichan
- Nov 29th 2008, 11:35 PMandreas
- Nov 29th 2008, 11:36 PMmr fantastic
- Nov 30th 2008, 12:48 AMmeiyukichan
- Nov 30th 2008, 01:58 AMacevipa

Rearrange the equation:

Try and make two perfect squares on the left side of the eqn.

Then find the centre and radius of the circle - Nov 30th 2008, 02:36 AMmr fantastic
- Nov 30th 2008, 09:43 AMmeiyukichan
- Nov 30th 2008, 11:06 AMmr fantastic
- Nov 30th 2008, 12:12 PMmeiyukichan
Oh! Thank you. I forgot that the equation was like this

meaning that since it was a positive, it is a negative then...

I didn't read the insulting post, but if it was something like how can I make such a simply mistake and saying how stupid I am, then I don't care because I'm too young to understand this stuff fully anyways...

I'm only in the 8th grade...