document.write( "Question 1171744: Given x^2+y^2+2x-10y+30=0. Find the measure of the radius. \n" ); document.write( "
Algebra.Com's Answer #796653 by math_helper(2461)\"\" \"About 
You can put this solution on YOUR website!

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document.write( "\"+x%5E2%2By%5E2%2B2x-10y%2B30=0+\"
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document.write( "Observe the above for a moment, and re-write it as:
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document.write( "\"+%28x%5E2%2B2x%2B1%29%2B%28y%5E2-10y%2B25%29%2B4=0+\"
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document.write( "Although you should by now notice there is going to be a problem, let's continue...
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document.write( "\"++%28x%2B1%29%5E2+%2B+%28y-5%29%5E2+%2B+4+=+0+\"
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document.write( "\"++%28x%2B1%29%5E2+%2B+%28y-5%29%5E2+=+-4+\"\r
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document.write( "The form of a circle  centered at (h,k) with radius r, is 
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document.write( "\"+%28x-h%29%5E2+%2B+%28y-k%29%5E2+=+r%5E2+\" and we have \"r%5E2+=+-4+\".  
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document.write( "This circle has a radius of 2i  (2 times the imaginary unit). 
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document.write( "This is probably NOT what you wanted.  Check your post carefully
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document.write( "for accuracy and re-post with corrections or clarification.  \r
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