document.write( "Question 1011104: Find the center(h,k) and r of the circle
\n" ); document.write( "X^2+y^2+10x-18y+106=49 \n" ); document.write( "

Algebra.Com's Answer #626673 by MathLover1(20850) $\"\"$ $\"About$

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Find the center( $\"h\"$ , $\"k\"$ ) and $\"r\"$ of the circle\r
\n" ); document.write( "\n" ); document.write( " $\"x%5E2%2By%5E2%2B10x-18y%2B106=49\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x%5E2%2B10x%29%2B%28y%5E2-18y%29%2B106=49\"$ ......complete squares\r
\n" ); document.write( "\n" ); document.write( " $\"%28x%5E2%2B10x%2Bb%5E2%29-b%5E2%2B%28y%5E2-18y%2Bb%5E2%29-b%5E2%2B106=49\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x%5E2%2B10x%2B5%5E2%29-5%5E2%2B%28y%5E2-18y%2B9%5E2%29-9%5E2%2B106=49\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x%2B5%29%5E2-25%2B%28y-9%29%5E2-81%2B106=49\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x%2B5%29%5E2%2B%28y-9%29%5E2-cross%28106%29%2Bcross%28106%29=49\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x%2B5%29%5E2%2B%28y-9%29%5E2=7%5E2\"$ \r
\n" ); document.write( "\n" ); document.write( "so, $\"h=-5\"$ , $\"k=9\"$ , $\"r=7\"$ , and the center is at ( $\"-5\"$ , $\"9\"$ )\r
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