document.write( "Question 376188: Find the radius of the circle defined by the equation: 5x^2+5y^3+60x+40y+215=0.
\n" ); document.write( "It tells me that the standard form of the equation of a circle is (x-h)^2+(y-k)^2=r^2 , but how do I go about putting this equation into standard form? I'm a bit confused please help. \n" ); document.write( "

Algebra.Com's Answer #267592 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
You need to complete the square in x and y.
\n" ); document.write( " $\"5x%5E2%2B5y%5E2%2B60x%2B40y%2B215=0\"$
\n" ); document.write( " $\"x%5E2%2B12x%2By%5E2%2B8y%2B43=0\"$
\n" ); document.write( " $\"%28x%5E2%2B12x%2B36%29%2B%28y%5E2%2B8y%2B16%29%2B43=36%2B16\"$
\n" ); document.write( " $\"%28x%2B6%29%5E2%2B%28y%2B4%29%5E2=52-16\"$
\n" ); document.write( " $\"highlight%28%28x%2B6%29%5E2%2B%28y%2B4%29%5E2=36%29\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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