SOLUTION: find the radius x^2-6x+y^2+4y = 36

Question 117007: find the radius
x^2-6x+y^2+4y = 36
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation
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Take half of the x coefficient -6 and square it.

Add this result to both sides

Combine like terms

Take half of the y coefficient 4 and square it.

Add this result to both sides

Combine like terms
------

Group like terms

Factor

Since the general equation of a circle is

we can see that with means . So the radius is 7
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