document.write( "Question 195441: solve x^2+18=9x by completing the square. \n" ); document.write( "

Algebra.Com's Answer #146565 by nerdybill(7384) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x%5E2%2B18=9x\"$
\n" ); document.write( "Move all the x's to the left:
\n" ); document.write( " $\"x%5E2-9x%2B18=0\"$
\n" ); document.write( " $\"x%5E2-9x=+-18\"$
\n" ); document.write( "Add to both sides half b coefficient then square it:
\n" ); document.write( " $\"x%5E2-9x%2B%2881%2F4%29=+-18+%2B+%2881%2F4%29\"$
\n" ); document.write( " $\"%28x-%289%2F2%29%29%5E2=+-%2872%2F4%29+%2B+%2881%2F4%29\"$
\n" ); document.write( " $\"%28x-%289%2F2%29%29%5E2=+%289%2F4%29\"$
\n" ); document.write( "Taking the square root of both sides:
\n" ); document.write( " $\"x-%289%2F2%29=+3%2F2\"$
\n" ); document.write( " $\"x+=+3%2F2+%2B+%289%2F2%29\"$
\n" ); document.write( " $\"x+=+12%2F2\"$
\n" ); document.write( " $\"x+=+6\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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